Prepare pasta according to package directions; drain. Rinse with cold water. Place in a bowl. Set aside. Meanwhile, chop eggs, red onion, chicken and bell pepper. Grate Parmesan cheese with grater. Snip parsley. Add eggs, onion, tomato, pepper, Parmesan cheese and parsley to pasta. Pour salad dressing over pasta mixture; mix well. Stack 3-4 lettuce leaves on top of each other; cut into thin shreds. To serve, line a bowl with lettuce. Spoon pasta salad into center of bowl.