Start by bringing a large pot of salted water to a rolling boil. Add your pasta and cook until al dente, roughly 8-10 minutes. Drain and rinse with cold water.

In a medium bowl, whisk together mayonnaise, sour cream, Dijon mustard, red wine vinegar, and garlic powder. Season with salt and pepper, then chill in the refrigerator.

While the dressing chills, gather the remaining ingredients: dice the chicken, crumble the turkey bacon, halve the tomatoes, shred the lettuce, and chop the red onion.

Add the cooled pasta to a mixing bowl with chicken, turkey bacon, tomatoes, lettuce, and red onion. Gently mix together.

Pour the chilled dressing over the combined ingredients and toss until everything is well-coated.

Cover and refrigerate for at least 30 minutes to allow flavors to meld before serving.