1 lb. hamburger
1/2 c. onion
1 can tomato paste
1 tsp. salt
1 tsp. oregano
1/4 tsp. garlic

In skillet brown meat and cook onion until tender, but not brown. Add tomato paste and seasonings. Simmer uncovered about 15 minutes. Put in but and add 1 slice of cheese. Wrap in foil and heat in oven at 325 degrees for 15 to 20 minutes.