Ingredients

• 1 pound thin spaghetti
• 1 (8 ounce) bottle Italian salad dressing
• 1/4 cup red wine vinegar
• 1 small red onion, chopped
• 1 (8 ounce) package pepperoni sausage, chopped
• 1 (4 ounce) jar sliced mushrooms
• 1 (16 ounce) can Italian-style diced tomatoes, drained
• 1 (3 ounce) jar sliced green olives, drained
• 1/4 (2.62 ounce) bottle salad seasoning mix
• 2 cups shredded Parmesan cheese