Mexican Chicken Cornbread Bake

I have an abundance of church/school fundraiser cookbooks. This recipe appears in several of them, so I have had it on my to-try list for a while.

MEXICAN CHICKEN CORNBREAD BAKE

1 stick butter
1 onion, finely chopped (I used half of a large one)
1 clove garlic, minced
1 (15.25 ounce) can whole kernel corn, drained (I used the Mexicorn with black beans in it)
1 (15 ounce) can cream-style corn
1/4 teaspoon salt
2 eggs
1 (8.5 ounce) package corn bread mix (I don't care for the sweetness of Jiffy, but I found Martha White and used that)

2 large boneless, skinless chikcen breasts boiled and cut into pieces
1 small jar canned green chiles, chopped
1 can cream of mushroom soup (can use cream of chicken or cream of celery)
1/2 cup sour cream
1/4 teaspoon salt
1/4 teaspoon ground black pepper
1 (8 ounce) package Monterey Jack cheese, shredded (I like it spicy so I used half pepper jack and half cheddar)

Preheat oven to 375 degrees. Grease 9x13 inch baking dish. Melt butter and saute onion and garlic until tender, about 4 to 6 minutes; set aside. In another bowl, combine drained whole kernel corn, cream style corn, salt and eggs. Beat in muffin mix. Fold in cooked onion mixture. Pour into prepared baking dish.

In a large bowl, combine chicken, green chiles, soup, sour cream, salt and pepper. Spoon over corn mixture to within 1 inch from edge. Sprinkle top with cheese. Bake in preheated oven for 35 to 40 minutes, or until edges are golden brown. This is even better the second day.