Cook pasta according to directions on box or cook in Instant Pot. Drain in colander, and rinse under cold water
Add pasta, chicken, salt, pepper, garlic and onion powder, tomatoes, celery and parsley to a large mixing bowl
Pour in dressing and cheese and about half of the bacon. Mix well. Top with remaining bacon and more parsley, if desired
Cover and refrigerate until ready to serve. Add more dressing before serving if needed
