In a large bowl, combine salad dressing, sugar, vinegar, dill and salt, if desired; mix well. Add cucumbers and onions; toss. Cover and chill for at least 1 one hour.
Peel cucumbers and slice thin. Layer in ... paper towels. Slice onions thin. Mix with cucumber slices. Beat with mayonnaise, sugar, and vinegar until creamy. Stir into cucumbers and onions.
Peel and thinly slice cucumbers; chop onions. Put onions and cucumbers ... ingredients. Pour over vegetable mixture and mix well. Cool for 6 to 8 hours.
Ingredients: 12 (cucumbers .. flakes .. mayo .. milk .. salt .. sauce ...)