Here's an easy main dish for a potluck. Boil the pasta, then toss with all the other ingredients and you're out the door. Drizzle the salad dressing over it just before serving.
Cook pasta according to package directions; drain. Rinse with cold water; drain again.
In a very large bowl, toss together cooked pasta, lettuce, chicken, red sweet peppers, red onion, bacon and Crispy Onions. Drizzle salad dressing over pasta mixture; toss gently to coat. Serve immediately.