01 - Bring a large pot of salted water to a rolling boil. Add the trimmed green beans and blanch for 2 to 3 minutes until they achieve a vibrant green hue and are tender-crisp. Immediately transfer the blanched beans to an ice bath to halt the cooking process. Drain thoroughly and pat dry with clean towels.
02 - In a large skillet set over medium heat, melt the unsalted butter. Add the minced garlic and sauté for approximately 1 minute until fragrant, ensuring it does not brown.
03 - Introduce the blanched green beans to the skillet with the garlic butter. Sauté for 2 to 3 minutes, stirring continuously, until the beans are heated through and well coated. Season with kosher salt, freshly ground black pepper, and optional crushed red pepper flakes.
04 - Remove the skillet from the heat. Stir in the finely diced dill pickles and pickle brine, ensuring they are evenly distributed throughout the green beans.
05 - Transfer the garlic butter green beans to a serving platter. Garnish with chopped fresh dill or parsley, if desired. Serve immediately.