Simple salad ..yet a meal....

 Cucumber 1,red onion 1 small,
tomato 1,cilantro as required,chop all separately.
Lemon juice 4 tblspn,black salt to taste.
Pour lemon juice in a bowl,drop in onion first,so it gets tender,top it with cucumber,tomato and cilantro.Refrigerate for an hour.
Can even treat as a meal.Add salt on serving.