1. 1. Cook pasta: Bring a large pot of salted water to a boil. Add rotini and cook until al dente according to package directions (about 8-10 minutes). Drain, rinse under cold water to stop cooking, and transfer to a very large mixing bowl.

2. 2. Prepare meats and cheese: Dice ham and salami into small bite-sized pieces. Quarter pepperoni slices. Cube provolone cheese. Add all to the bowl with pasta.

3. 3. Chop veggies: Halve cherry tomatoes, finely dice red onion and green bell pepper, drain banana peppers, chop parsley. Add all vegetables and herbs to the bowl.

4. 4. Make dressing: In a medium bowl, whisk together olive oil, red wine vinegar, mayonnaise, Dijon mustard, oregano, garlic powder, salt, and pepper until smooth.

5. 5. Combine: Pour dressing over ingredients in the bowl. Toss gently but thoroughly until everything is evenly coated.

6. 6. Chill: Cover bowl and refrigerate for at least 1 hour (ideally 2-3 hours) for flavors to meld.

7. 7. Serve: Give a final stir before serving. Adjust seasoning if needed.