Best Turkey à la King Recipe - How To Make Turkey à la King

Ingredients

• 4 tbsp. (1/2 stick) unsalted butter
• 8 oz. crimini mushrooms, sliced (about 2 1/2 c.)
• 1/2 medium yellow onion, finely chopped
• 1 medium carrot, peeled, finely chopped
• 1 stalk celery, finely chopped
• 1/3 c. all-purpose flour
• 2 c. low-sodium chicken broth
• 1 1/2 c. whole milk
• Kosher salt
• Freshly ground black pepper
• 1 1/2 lb. cooked turkey breast, cut into 1" chunks
• 1 c. frozen petite peas
• 1/4 c. chopped fresh parsley
• Warm biscuits, puff pastry shells, toast, or cornbread, for serving