2 (8 oz.) cans pizza sauce
3/4 c. diced green pepper
3/4 c. chopped onion
2 eggs
8 slices American cheese
1/4 c. grated Parmesan cheese
1 lb. ground beef
1 tsp. oregano
3 c. Bisquick
1 c. milk
1 (4 oz.) can mushrooms, drained

Brown beef; add 1 can pizza sauce, green pepper, onion and oregano. Simmer mixture uncovered, 10 minutes. Combine in bowl Bisquick, egg and milk. Beat until smooth. Spread 1/2 Bisquick mixture in greased pan; spread 1 can pizza sauce evenly on top of batter. Place 4 slices of cheese on top of sauce and cover with beef mixture. Sprinkle mushrooms on top of beef and top with remaining 4 slices of cheese. Sprinkle with Parmesan cheese and spread remaining Bisquick evenly on top. Bake at 400 degrees for 20 to 25 minutes or until top is golden brown. Let it sit 10 minutes before cutting.