Ingredients

• 1 lb rigatoni pasta
• 1 tablespoon olive oil
• 1 small onion, chopped
• 1/2 green pepper, chopped
• 2 teaspoons minced garlic
• 1 (8 ounce) can sliced mushrooms, drained
• 1 teaspoon cruched basil
• 1/2 teaspoon oregano
• 1 (28 ounce) can crushed tomatoes
• 1 teaspoon sugar
• 1 (16 ounce) part-skim ricotta cheese
• 1/2 cup parmesan cheese
• 1 cup reduced-fat sour cream
• 1/8 cup chopped fresh parsley
• 1/2 teaspoon salt
• 4 -6 ounces sliced pepperoni
• 2 cups part-skim mozzarella cheese, DIVIDED
• 1 egg, beaten