Chili Tamale Casserole

3 cans of tamales
1 can of chilli with beans
8 oz bag shredded cheddar and white cheese
1 onion
bag of frito corn chips

Remove tamales from wrappers
Cut up onion into small chunks
Place tamales into 3 quart casserole dish
Pour onions over tamales
Spread chilli over top
Bake in oven until hot
Cover with cheese and corn chips