In a large bowl, combine cooked and cooled tortellini with bell pepper, grape tomatoes, cucumber, red onions, mozzarella, pepperoni, olives, and parsley.

In a small bowl or measuring cup, whisk together dressing ingredients: olive oil, red wine vinegar, oregano, garlic powder, red pepper flakes. Taste and season with salt and pepper as needed. You can also add a bit of sugar or agave to dressing to sweeten it if you prefer it less tangy. Pour dressing over salad and stir to combine all ingredients and coat with dressing.

Serve immediately or store in an airtight container in the refrigerator.