How to make summer salad with tomatoes?

How is summer and it is good to consume relatively high amounts of vegetables and fruits, here's a simple recipe, perhaps the simplest of the way can be a recipe for salad, easily digested, energizing, rivitalizanta, natural, vegetable.
Summer salad with tomatoes

4 medium tomatoes
2 medium cucumbers garden

1 medium onion
oil to taste
salt to taste

Wash and cut onions sliced, grated or so. Wash and cut tomatoes into slices or cubes, as well as cucumbers and place them in a bowl bigger. Mix and add salt and oil to taste. Allow to cool and use as a garnish or as such.

An option is also to used pepper, vinegar, thyme, dill, etc..