Pork & Mushroom Pasta Pizza

2 cups of packaged dried rope macaroni or corkscrew macaroni
1 slightly beaten egg
1/4 cup of milk
2 tablespoons of grated Parmesan or Romano cheese
1 pound of ground pork or ground beef
1 cup of chopped onion
2 cloves garlic, minced
One 15 ounce can or jar of pizza sauce
1/4 teaspoon of crushed red pepper
One 4 ounce can of sliced mushrooms, drained
1/2 cup of chopped green sweet pepper
1 cup of shredded mozzarella cheese