Cook the Bacon: In a skillet over medium heat, cook the bacon until crispy, about 8-10 minutes. Transfer to a paper towel-lined plate and chop into pieces.

Prepare the Tortellini: Bring a large pot of salted water to boil. Cook frozen cheese tortellini according to package instructions until al dente, about 3-5 minutes. Drain and rinse under cold water.

Make the Dressing: In a mixing bowl, combine mayonnaise, red wine vinegar, garlic powder, oregano, Italian seasoning, red pepper flakes, and salt. Whisk until well blended.

Combine Ingredients: Add cooled tortellini, chopped bacon, pepperoncini, red onion, tomatoes, and parmesan to the bowl with dressing. Gently toss to combine.

Chill the Salad: Cover with plastic wrap or transfer to an airtight container. Refrigerate for at least 2 hours.

Final Touches Before Serving: Toss salad again before serving, adjust seasoning if needed, and serve chilled.