Baked Pizza Sandwich - cooking recipe

Ingredients

1 lb. ground beef
2 (8 oz.) cans tomato sauce
1 tsp. oregano
2 c. Bisquick
1 egg
2/3 c. milk
8 slices American cheese
1 (2 oz.) can sliced mushrooms, drained
1/4 c. grated Parmesan cheese

Preparation

Heat oven to 400\u00b0. Grease a 9 x 12-inch pan. Cook the beef until brown.
Drain.