Mexican Casserole - cooking recipe

Ingredients

2 lb. ground beef
1 small onion
2 cans Ro-Tel tomatoes
1 large (13 oz.) can Pet milk
1 can each: cream of chicken and cream of mushroom soup
2 pkg. taco flavored Doritos, crushed*
1/2 lb. grated Cheddar cheese or cheese of your choice

Preparation

*For easy dividing, crush each bag separately.