Slice cucumbers very thin and place the slices with a pinch of salt on a colander to remove some of the water. Let them sit for 10-15 minutes.
Squeeze the cucumbers to remove the water before placing them in a salad bowl.
Meanwhile, slice the onions and the dill.
Place the cucumbers in a salad bowl and add onion and dill.
Make the vinaigrette:
Mix vinegar, water, oil, salt and sugar together and bathe the vegetables with it. Toss the cucumbers in the vinaigrette and let the salad marinate for about 25-30 minutes before serving.
Ooptional sprinkle sweet paprika over the salad and serve.