1/2 med. onion, chopped
3 lbs. hamburger
3/4 lb. grated Cheddar cheese
1 can (4 1/2 oz.) chopped olives
1 can (4 oz.) diced green chilies
1 (15 oz.) can tomato sauce
2 (4 oz.) cans mushroom pieces
3 doz. hard rolls

Brown and drain onions and hamburger. Allow to cool 4 or 5 minutes, then add cheese, olives, green chilies, tomato sauce and mushroom pieces.

Hollow out the hard rolls. Stuff with meat mixture. Wrap individually in aluminum foil. Do not bake until ready to serve. These are good to freeze.

Heat oven to 350 degrees and heat unfrozen sandwiches in foil 20 to 30 minutes. If frozen cook 45 minutes at 300 to 325 degrees oven. Check to make sure the rolls are not getting too hard while heating. If they are, turn oven down.