Cook pasta to desired doneness as directed on package.
Meanwhile, in small bowl, combine mayonnaise, yogurt, dill, milk and pepper; mix well.
Drain pasta; rinse with cold water. In large bowl, combine cooked pasta, salmon and peas; mix gently. Pour dressing over salad; toss gently to coat.
Arrange lettuce on 5 individual plates. Spoon salad onto lettuce. Garnish with parsley. Serve immediately, or cover and refrigerate until serving time.