Begin by heating a large skillet over medium heat. Add the bacon strips and cook for 6-8 minutes, or until they are crispy and golden brown. Transfer the bacon to a paper towel-lined plate to drain excess grease. Let it cool before chopping it into bite-sized pieces.

In a large pot, bring water to a rolling boil. Add a pinch of salt and the cheese tortellini, cooking according to the package instructions, usually about 3-5 minutes until al dente. Drain the tortellini in a colander and immediately rinse under cold water to stop the cooking process.

In a large mixing bowl, combine the mayonnaise, red wine vinegar, and salt. Add oregano, Italian seasoning, garlic powder, and red pepper flakes, stirring until all ingredients are well blended into a creamy dressing.

To the bowl with the dressing, add the cooled tortellini, chopped bacon, pepperoncini peppers, shredded Parmesan cheese, diced red onion, and halved tomatoes. Gently toss all the ingredients together, ensuring everything is evenly coated in the creamy dressing.

Cover the bowl tightly with plastic wrap or a lid and refrigerate the salad for at least 1 hour, allowing the flavors to meld beautifully. Serve it cold at your next gathering.