Pizza Burgers - cooking recipe

Ingredients

1 lb. ground beef
1 small can tomato sauce
1 Tbsp. chopped onion
1 small can mushrooms (optional)
pinch of oregano
Mozzarella cheese

Preparation

Brown ground beef.
Add rest of ingredients, except cheese. Cook until thick.
Scoop on hamburger rolls.
Add a slice of cheese.
Wrap in aluminum foil.
Heat until cheese melts.