Instructions

  1. Cook pasta according to package directions; rinse in cold water and drain.
  2. In a bowl, combine mayonnaise and sugar.
  3. Stir in the tuna, celery, onions, green pepper, carrot and parsley.
  4. Spoon into pasta shells; cover and refrigerate.
  5. Dressing: Combine sour cream, sugar, vinegar, mayonnaise, celery seed, and onion powder.
  6. Arrange lettuce leaves and shells on individual plates; drizzle with dressing.