In a large pot, cook 1 pound rotini pasta al dente according to package directions. Drain the pasta and rinse with cold water. Drain well and set aside.
In a large bowl, combine cooked pasta, 1 cup mini pepperoni, 8 ounces cubed mozzarella, 1 cup halved cherry tomatoes, 1 diced green bell pepper, 1 (2.5-ounce) can sliced black olives, and ½ small diced red onion.
Dressing
In a medium-sized bowl, whisk together ½ cup olive oil, ½ cup pizza sauce, ¼ cup red wine vinegar, ¼ cup grated parmesan cheese, 2 teaspoons Italian seasoning, ½ teaspoon garlic powder, 1 pinch red pepper flakes, and salt and pepper to taste.
Pour the dressing over the pasta salad and gently toss to coat the ingredients well. Serve immediately or chill until ready to serve.
Notes
Storage & Make-Ahead Instructions
Leftovers: Store in an airtight container in the fridge for up to 5 days.
Make Ahead: This pasta salad keeps well. Make up to 48 hours in advance. Reserve some of the dressing to add and toss right before serving.