1
Toss together peeled and sliced cucumbers, tomatoes, and onions in a large bowl.

Sugar, vinegar, oil, water, salt, and pepper whisked together.

2
Whisk together sugar, vinegar, oil, water, salt, and pepper. Whisk until the sugar is dissolved.
Pouring vinegar mixture over veggies.
3
Pour vinegar mixture over the veggie mixture and toss.

Bowl covered in plastic wrap.

4
Cover and refrigerate at least 2 hours before serving.