Step 1

Bring a pot of water to a boil and cook pasta according to package directions. Drain pasta, rinse with cool water, and drain again. Meanwhile, continue with recipe.

Step 2

Make Caesar dressing: In a large bowl, whisk together Parmesan, mayonnaise, olive oil, lemon juice, mustard, Worcestershire, garlic, anchovy, and 1/4 tsp. each salt and pepper. Taste and add more salt and pepper if you like. Scoop out 1/4 cup dressing and set aside.

Step 3

Transfer drained pasta to bowl with remaining dressing and toss with chicken and onion. Just before serving, toss salad with lettuce and as much additional dressing as you like. Sprinkle salad generously with more pepper.