Famous Biscuit Pot Pie | Cooking Professionally

Ingredients

• 7 tablespoons unsalted butter, divided, plus more, to taste, for greasing the dish
• 1 medium-size yellow onion, chopped
• 3 medium carrots, peeled and cut into 1/4-inch-thick slices
• 3 stalks celery, sliced
• 1 (8-ounce) package fresh green beans, trimmed and cut into 1-inch pieces
• 1/4 cup plus 3 tablespoons all-purpose flour
• 4 cups chicken broth
• 3 chicken breasts, boneless and skinless, cut into 1-inch pieces
• 3 tablespoons fresh parsley, chopped, plus 12 fresh parsley leaves, for the biscuits
• 1 1/2 tablespoons fresh thyme, chopped
• 2 teaspoons kosher salt
• 1/2 teaspoon black pepper, plus more, to taste, for the biscuits
• 12 frozen buttermilk biscuits