Bring a large pot of salted water to a boil. Cook tortellini according to package directions (usually 3-5 minutes). Drain and rinse under cold water until cool.

Cook the bacon until extra crispy. Drain on paper towels, cool, and chop into pieces.

In a large mixing bowl, whisk together the mayonnaise, red wine vinegar, grated parmesan, garlic powder, oregano, salt, and black pepper.

Stir the thinly sliced red onions into the dressing mixture and let sit for 5 minutes.

Add the cooled tortellini, halved cherry tomatoes, and chopped bacon to the bowl with the dressing.

Toss gently until all ingredients are thoroughly coated in the creamy dressing.

Garnish with extra parmesan cheese and black pepper. Serve immediately or cover and chill in the refrigerator.