Toss cucumber with salt in large bowl. Cover with plate that rests directly on cucumbers; weight down with 1-pound can. Let stand 1 to 2 hours. Drain in colander; rinse well.
Combine lemon juice, oil, sugar, and dill in serving bowl. Mix in onion and cucumber. Refrigerate overnight. Serve cold or at room temperature.
Note: If you are concerned if the oils or other ingredients in these recipes are suitable for Passover, seek non-dairy substitutes or ingredients that are certified kosher for Passover.
Recipe courtesy Family Circle Magazine