Ingredients

• 1 (16 ounce) package small shell pasta
• 1 red bell pepper, chopped
• 1 green bell pepper, chopped
• 1 tomato, chopped
• 5 green onions, chopped
• 1 (4.5 ounce) can sliced mushrooms, drained
• 2 1/2 ounces sliced pepperoni sausage
• 1 (2.25 ounce) can sliced black olives, drained
• 2 cloves garlic, minced
• 1 teaspoon dried oregano
• 1/2 teaspoon salt
• 1/4 teaspoon ground black pepper
• 1 cup Italian-style salad dressing
• 1 cup shredded mozzarella cheese
• 2 tablespoons grated Parmesan cheese