Wash the cherry tomatoes and the cucumber. Optionally peel the cucumber. Cut the tomatoes in half and the cucumber in half, then in slices.
Wash and drain the arugula. Add it to a salad bowl with the tomatoes, cucumber and pitted olives.
Make the dressing by mixing the olive oil, balsamic vinegar and maple syrup with the mint and oregano. Pour it over the salad and toss until everything is coated.
If desired, sprinkle with buckwheat groats for some crunch.
Notes
To take the salad on the go, store the dressing in a separate container and add it right before serving.