1 (16 once) loaf of unsliced Italian or Sourdough bread
1/2 cup bottled pizza sauce
8 thick slices of onion, separated into rings
1 cup sliced mushrooms
6 ounces cooked lean ground beef
1 tps Italian seasoning
1/2 tsp garlic powder
1/4 tsp crushed red pepper
1-1/2 cups (6 ounces) shredded pizza cheese (a blend of part-skim mozzarella and/or cheddar or Jack cheese)
Preheat oven to 500 degrees. Cut bread loaf in half horizontally. Place both halves of bread, cut side up, on a large baking sheet. Spread 1/4 cup pizza sauce over each half of bread. Divide onion rings and sliced mushrooms evenly between bread halves. Crumble ground beef into 1/2 inch pieces, and divide evenly between bread halves. Sprinkle Italian seasoning, garlic powder and crushed red pepper evenly over each pizza; top each with 3/4 cup shredded cheese.
Bake pizza halves at 500 degrees for 9 minutes or until cheese melts. Cut each pizza half into 3 equal pieces. Serves 6.