1 lb. ground beef
1/4 c. chopped onion
6 oz. grated Cheddar or American cheese
1 can tomato soup
Salt & oregano (if desired)
Hamburger buns

Brown ground beef and onion until barely cooked. Mix with cheese, soup and seasonings. Spread over hamburger buns on baking sheet. Bake at 350 degrees for 7-10 minutes, just until cheese melts. Top with more cheese.