Chicken tater tot casserole

10 oz - 1 lb cooked (or canned) chicken
1/2 onion, chopped
1 tbsp oil
1 can (10 3/4 oz) low sodium cream of mushroom soup
1/2 cup ketchup
Small bag frozen peas and carrots
2 cup grated Colby jack cheese
2 lb package frozen tater tots

1. Cook the onions in the oil until translucent.
2. Mix the soup and ketchup in a small bowl.
3. Layer the ingredients in a greased 9 x 13 oven-proof dish, in this order: chicken, onion, soup-ketchup mixture, peas and carrots, cheese.
4. Arrange the tater tots across the top. (This is an excellent project for pre-schoolers!)
5. Bake in preheated 325 degree oven for 1 hour.

This can be assembled a day ahead and baked later.