Step 1

Heat a large pot of water over high heat until boiling. Add a generous amount of salt to season the pasta while it cooks. Once the water is boiling, cook the pasta according to the package instructions. Drain.

Step 2

Meanwhile, chop the vegetables. Dice the peppers, celery, carrots, and onion into finely diced pieces.

Step 3

Once the pasta is drained, add to a large bowl. Toss the diced vegetables into the pasta.

Step 4

In a medium bowl, stir together mayonnaise, sour cream, red wine vinegar, sugar, mustard, red chili flakes, garlic powder, salt and pepper.

Step 5

Toss pasta and vegetables with dressing and stir well to coat. Taste for seasonings and add more salt and pepper, if needed. Cover and refrigerate until ready to serve.