2 cans cream of celery soup
1 chopped onion
1 1/2 lb. ground beef
1 pkg. Doritos
1 lb. Velveeta cheese, grated
1 can Ro-Tel

Brown beef and onions; drain. Combine rest of ingredients reserving 1/4 of the cheese. Place in casserole with remaining cheese on top. Heat in oven 15-20 minutes.