For a comforting Southern Chicken Noodle Casserole, start by preheating your oven to 350°F. In a large bowl, combine 2 cups of shredded cooked chicken, 3 cups of cooked egg noodles, a can of cream of chicken soup, and a cup of milk. Stir in 1 cup of frozen mixed vegetables, 1/2 teaspoon of garlic powder, and season with salt and pepper. Pour the mixture into a greased 9x13 inch baking dish, and if you like, top it with 1/2 cup of breadcrumbs and 1 cup of shredded cheddar cheese. Bake for 25-30 minutes until it's bubbly and golden brown. Let it cool slightly before serving, and enjoy this hearty, easy-to-make dish!