1. Add cooked pasta, chicken, onions, and sugar snap peas to large serving bowl and toss to mix.
  2. Add light mayonnaise, fat-free sour cream, low-fat milk or fat-free half-and-half, and chopped sun dried tomatoes to a small bowl or 2-cup measure and stir with fork to blend well into a dressing. Drizzle over the pasta mixture and toss to blend everything.
  3. Serve immediately, or cover and keep in refrigerator until ready to serve.
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