2 lbs. hamburger, brown, drain, cool
1 1/2 lbs. grated cheddar cheese
1 sm. onion, finely chopped
2 cans tomato soup
1/2 tsp. oregano
1 tsp. garlic salt
1/2 c. salad oil

Mix ingredients together and refrigerate overnight. Spread open faced on hamburger buns, place under broiler until mixture bubbles. Makes 30 sandwiches