Pizza Pop Up - cooking recipe

Ingredients

1 lb. ground beef
1 onion, chopped
1 (16 oz.) jar spaghetti sauce
1 can sliced mushrooms
1 Tbsp. butter
1/2 tsp. oregano
salt to taste
1 (6 oz.) pkg. Mozzarella cheese

Preparation

Saute beef and onion.
Add mushrooms, sauce and seasonings. Pour into a 9 x 13-inch casserole dish.
Top with sliced Mozzarella cheese.
Bake at 400\u00b0 for 10 minutes.