I make this for my family alot they love it.
1 1/2 pounds lean ground beef
1 small onion, chopped
6 ounces shredded mild Cheddar or American cheese
1 can (8 ounces) tomato sauce
2 tablespoons chopped black olives
1/4 cup salsa
12 hard rolls

Brown ground beef with onion; drain well. Stir in cheese,
tomato sauce, olives, and salsa. Pinch bread out of center
of rolls; fill rolls with beef mixture. Wrap each roll in
foil; bake at 350° for 25 to 30 minutes.
Makes a dozen sandwiches.