Delicious sour cream chicken enchilada casserole

Chicken second courses

1 pound Chicken tenders 1 cups Chicken broth 1 medium Onion 2 tablespoons Butter 2 can (12 oz) Cream of Chicken Soup 1 carton Sour cream 16 ounces Monterey jack cheese 1 cup Milk 1 small Green Chiles 1 package Corn or flour tortillas 1 teaspoon Garlic powder 1 teaspoons Pepper