My mom's recipe:
Slice cucumbers really thinly after peeling skin off. Slice an onion really thinly also. Put sliced cucumbers and onion in a bowl and salt them. Refrigerate overnight or for a few hours. Poor liquid off. Then take whipping cream and add vinegar to taste. Put over cucumbers. I usually slice about 6 cucumbers with an onion. Then take a coffee mug and fill 3/4 of the way with whipping cream and then add a few teaspoons of vinegar. YUM!!!