First, prep the cucumbers. Salt them heavy, cover then place in the refrigerator for one hour. After, rinse them and drain the excess water from them. This step can be skipped but your cucumber salad will get very watery.
Now, while the cucumbers are draining prep the other ingredients. Chop the onion and add the slices to water if you want to take away the bite. Slice olives and halve tomatoes. If your feta cheese is not crumbled, do that now.
In a small bowl, add olive oil, chopped basil, oregano, juice a lemon pour in red wine vinegar and season with salt and black pepper. Give the dressing a mix then sat aside.
When the cucumbers are ready toss all the chopped ingredients in a bowl together.Then, pour over dressing and mix well. Taste for salt and serve.
Note, if you prepped the cucumbers the recipe will be fine to serve later. But if you didn't serve immediately because you won't have long before the water starts to leak from the cucumbers.