sliced tomatoes and cucumbers marinated in olive oil

Ingredients:

Two big cucumbers, thinly sliced; one big red onion, thinly sliced; three big tomatoes, sliced or wedges
One fourth cup olive oil; one fourth cup apple cider vinegar, or red wine vinegar; two teaspoons sugar (optional, for a somewhat sweet taste).

One teaspoon salt; one half teaspoon black pepper; one teaspoon dried oregano; one teaspoon dried basil; optional one half teaspoon garlic powder
optional garnish fresh parsley or basil.