Pizza Burgers - cooking recipe

Ingredients

2 lb. lean ground beef, cooked and drained
2 large onions, chopped
2 (6 oz.) cans tomato paste
1 1/3 c. water
2 tsp. salt
1/2 tsp. pepper
1 tsp. dried oregano

Preparation

Add ingredients together; bring to boil.
Simmer for 5 minutes.
Put on hamburger buns; top with Mozzarella cheese. Cover with aluminum foil; bake for 5 minutes, or until cheese melts.