Chicken Tamale Casserole

Name: Chicken Tamale Casserole
Prep time: 15 min
Cook time: 40 min
Total time: 55 min
Cuisine: American, Mexican
Ingredients: 1 1/4 cups shredded cheddar cheese, (divided); 1 1/4 cups shredded Monterey Jack cheese, (divided); 1/3 cup milk; 1 egg, (lightly beaten); 1 teaspoon cumin; 1/2 teaspoon freshly ground black pepper; 14 ounce can cream style corn; 8.5 ounce corn bread mix ((like Jiffy)); 4 ounce can diced green chiles, drained; 3 cups shredded cooked chicken ((I use rotisserie chicken)); 1 cup red enchilada sauce ((your favorite brand - I love Hatch)); 4 ounce can sliced black olives; 4 green onions, (chopped); sour cream, (for serving)