2 lb. ground beef
1 large onion, chopped
1 can mushroom soup
2 (4 oz.) cans mushrooms
1 c. mayonnaise (not light or fat-free)
3/4 c. finely chopped celery
1 can Cheddar cheese soup
16 buns

Brown beef and onion. Combine rest of ingredients. Cook until heated through. Serve on a bun.

Makes 16.