Broccoli Quinoa Hearty Casserole

Featured in: One-Pot Meals

This wholesome casserole blends tender chicken, fluffy quinoa, and vibrant broccoli with melted cheese for a satisfying meal. The broccoli is steamed until just tender, then combined with cooked quinoa, shredded chicken, egg, and seasonings. Topped with a creamy cheese layer, it's baked until bubbly and golden. Perfectly balanced and easy to prepare, it suits meal prep, offering freezer-friendly and naturally gluten-free qualities. Variations accommodate vegetarian preferences by substituting mushrooms or extra broccoli.

Updated on Sun, 15 Feb 2026 09:32:00 GMT
Wholesome broccoli quinoa casserole with tender chicken, creamy cheese, and vibrant veggies, baked to golden perfection.  Pin
Wholesome broccoli quinoa casserole with tender chicken, creamy cheese, and vibrant veggies, baked to golden perfection. | garlicgroove.com

My neighbor dropped off a rotisserie chicken one Tuesday evening with a knowing smile—she'd caught wind that I was buried under deadlines and barely keeping up with dinner plans. Standing in my kitchen with this golden bird, a half-empty box of quinoa, and a bunch of broccoli starting to wilt, I realized I had exactly forty minutes to turn these scattered ingredients into something that would feel like real comfort food. That casserole became my secret weapon that week, and honestly, it's been my go-to ever since whenever I need something substantial but effortless.

I made this for my book club on a rainy Saturday, and what I remember most isn't the recipe itself but how the conversation shifted once people started eating—suddenly everyone was slower, quieter, actually present in a way that felt rare. One friend asked for the recipe with her mouth half full, which felt like the highest compliment, and another admitted she'd been living on takeout for three weeks. The casserole didn't solve anything, but it gave us all a moment where comfort felt simple and genuine.

Ingredients

  • Cooked quinoa (2 cups, about 3/4 cup dry): Quinoa's nutty texture holds up beautifully in a hot casserole without turning mushy, and it adds that protein boost that makes this dish feel complete on its own.
  • Cooked chicken (2 cups, shredded or diced): Rotisserie chicken is your friend here—it's already seasoned and adds richness without any real effort on your part.
  • Large egg (1): This acts as the gentle binder that keeps everything cohesive; don't skip it or the casserole will feel loose and fragmented.
  • Broccoli florets (3 cups, steamed until just tender): The key word is 'just tender'—oversteam and you'll lose that subtle crunch and bright color that makes this visually appealing.
  • Shredded cheese, divided (2 cups total): A blend of cheddar and mozzarella works magic here, giving you both flavor depth and that melty, bubbly top everyone reaches for first.
  • Chicken stock (1/2 cup, low sodium if preferred): This keeps the casserole moist without making it soupy; it's the difference between something creamy and something that feels wet.
  • Dried basil (1/2 teaspoon): Basil whispers rather than shouts, lending a subtle herbaceous note that ties all the elements together.
  • Dried oregano (1/2 teaspoon): Oregano deepens the savory profile and plays nicely with the cheese without overwhelming anything.
  • Salt and black pepper (1/4 teaspoon each): Taste as you go—you might discover your cheese is already salty and you need less, or that you want just a pinch more pepper for brightness.

Instructions

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Set the stage:
Preheat your oven to 350°F and lightly grease a 9 x 9-inch baking dish—I use a light hand with oil because the cheese will provide plenty of richness once it melts.
Get your quinoa ready:
Cook it according to package directions if you haven't already, then spread it on a plate so it cools just enough that it won't scramble the egg when you combine everything. Slightly warm is actually perfect.
Steam the broccoli with intention:
Use just enough water to create steam—about 1/2 inch in the bottom of your pot—and cover it tightly. Three to five minutes is the sweet spot; you want it bright green and tender enough to fork through, not soft enough to fall apart.
Mix with patience:
In your largest bowl, combine the cooled quinoa, chicken, steamed broccoli, egg, stock, one cup of cheese, and all your seasonings. Stir until everything is evenly distributed and the egg has loosened things just enough to hold together without being overly wet.
Transfer and settle:
Pour the mixture into your prepared dish and press gently with the back of a spoon to create an even surface. This helps everything bake uniformly and makes for cleaner portions later.
Top with ambition:
Sprinkle that second cup of cheese across the top in an even layer—this is going to be the golden, bubbly crown of your casserole.
Bake with patience:
Cover the dish with foil and bake for 30 minutes to let everything warm through and allow the flavors to meld. Then remove the foil and bake another 5 to 10 minutes until the cheese is melted and the edges are just starting to brown.
Rest and serve:
Let it sit for five minutes after coming out of the oven—this isn't just about letting it cool, it's about letting the mixture set slightly so it portions cleanly instead of falling apart on your spoon.
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Measure spices, liquids, and baking ingredients accurately for consistent results in cooking and baking.
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Hearty and healthy casserole loaded with fluffy quinoa, steamed broccoli, shredded chicken, and melted cheese in every bite.  Pin
Hearty and healthy casserole loaded with fluffy quinoa, steamed broccoli, shredded chicken, and melted cheese in every bite. | garlicgroove.com

Last winter, my sister brought her kids over on a snowy afternoon, and they actually asked for seconds of vegetables—something that had never happened before in my presence. Watching her lean back in her chair, genuinely satisfied, reminded me that the best recipes aren't the complicated ones; they're the ones that let good ingredients shine without pretense.

The Beauty of Strategic Prep

One of the quieter joys of this casserole is that you can assemble it entirely while watching something you actually want to watch, or while half-listening to someone ramble about their week. The hardest part—cooking the quinoa and chicken—happens on its own timeline, and once those are done, you're just combining things in a bowl. I've found that doing this step in the morning, then sliding it into the oven when I get home, makes me feel like I have my life slightly more together than I actually do.

Flexibility Without Apology

This casserole doesn't demand perfection or fidelity to the exact formula. I've made it with sautéed mushrooms instead of chicken for vegetarian friends, and it's equally satisfying; I've swapped the cheese blend based on what was in my fridge, and honestly, it's never been worse for it. One time I was out of dried oregano and used a pinch of thyme instead, and it took on this slightly woodsy quality that felt like autumn. The recipe is sturdy enough to accommodate your kitchen reality without collapsing.

Make Ahead Magic and Storage

The real magic happens when you assemble this the night before—something shifts overnight, the flavors deepen, and it bakes more evenly the next day. Wrapped tightly in the fridge, it keeps for 24 hours pre-baking, and if you're thinking even further ahead, you can freeze it unbaked in a metal dish for up to three months. Leftovers reheat beautifully covered at 350°F; they don't dry out or separate, they just become even more welcoming.

  • Assemble ahead and refrigerate up to 24 hours, or freeze unbaked for longer storage—just thaw completely before baking.
  • Leftovers keep for four days in the fridge and reheat covered without losing their creamy, cohesive texture.
  • This dish becomes even more flavorful the next day, so there's actual incentive to make extra.
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Easy gluten-free broccoli quinoa casserole featuring cheesy layers, savory chicken, and wholesome ingredients for a comforting family meal. Pin
Easy gluten-free broccoli quinoa casserole featuring cheesy layers, savory chicken, and wholesome ingredients for a comforting family meal. | garlicgroove.com

This casserole won't change your life, but it will absolutely change your Tuesday. Make it once, and you'll know exactly why it keeps finding its way back onto your table.

Recipe Questions

Can I make this dish vegetarian?

Yes, simply omit the chicken and add sautéed mushrooms or extra broccoli to maintain texture and flavor.

Is quinoa naturally gluten-free?

Quinoa is naturally gluten-free but check packaging for cross-contamination if sensitive.

How do I steam broccoli properly for this dish?

Steam broccoli florets in a small amount of water, covered, for 3–5 minutes until bright green and just tender.

What cheese types work best for this bake?

Cheddar, mozzarella, or a blend of both provide creamy texture and rich flavor.

Can I prepare this dish ahead of time?

Yes, assemble it in advance, cover tightly, refrigerate up to 24 hours, or freeze unbaked for longer storage.

How should leftovers be stored and reheated?

Store leftovers covered in the fridge up to 4 days and reheat at 350°F (175°C) until warmed through.

Broccoli Quinoa Hearty Casserole

A wholesome dish combining chicken, quinoa, broccoli, and cheese baked for a comforting meal.

Prep duration
10 min
Cook duration
35 min
Complete duration
45 min


Complexity Easy

Heritage American

Output 4 Portions

Dietary requirements No gluten

Components

Grains & Base

01 2 cups cooked quinoa (about 3/4 cup dry)

Protein

01 2 cups cooked chicken, shredded or diced
02 1 large egg

Vegetables

01 3 cups broccoli florets, steamed until just tender

Dairy

01 2 cups shredded cheese, divided (cheddar, mozzarella, or a blend)
02 1/2 cup chicken stock (low sodium if preferred)

Seasonings

01 1/2 teaspoon dried basil
02 1/2 teaspoon dried oregano
03 1/4 teaspoon salt
04 1/4 teaspoon black pepper

Directions

Step 01

Prepare baking dish: Preheat oven to 350°F. Lightly grease a 9 x 9-inch baking dish with oil or nonstick spray.

Step 02

Cook quinoa: If not already prepared, cook quinoa according to package directions and let cool slightly.

Step 03

Steam broccoli: Steam broccoli florets in 1/2 inch water, covered, for 3 to 5 minutes until bright green and tender. Drain thoroughly.

Step 04

Combine mixture: In a large mixing bowl, combine cooked quinoa, cooked chicken, steamed broccoli, egg, chicken stock, 1 cup shredded cheese, dried basil, oregano, salt, and pepper. Mix until evenly combined.

Step 05

Transfer to baking dish: Pour the mixture into the prepared baking dish and press down gently to create an even layer.

Step 06

Top with cheese: Sprinkle the remaining 1 cup of cheese evenly over the top.

Step 07

Bake covered: Cover the dish with foil and bake for 30 minutes.

Step 08

Finish baking: Remove foil and bake for an additional 5 to 10 minutes until the cheese is melted and bubbly.

Step 09

Rest and serve: Let rest for 5 minutes before serving. Portion into bowls and enjoy hot.

Necessary tools

  • 9 x 9-inch baking dish
  • Large mixing bowl
  • Medium saucepan or pot for steaming
  • Aluminum foil
  • Oven

Allergy details

Review each ingredient for potential allergens and speak with a healthcare provider if you're uncertain about anything.
  • Contains milk (cheese)
  • Contains egg
  • May contain gluten if using non-certified quinoa or processed stock; check labels if celiac

Nutrition breakdown (per portion)

These values are provided as estimates only and shouldn't replace professional medical guidance.
  • Energy: 506
  • Fat: 26 g
  • Carbohydrates: 26 g
  • Protein: 39 g