Cut cucumbers and tomato in half. Remove seeds. Chop cucumber, tomato, bell pepper, and onion.
Whisk together oil and next 4 ingredients in a large bowl until sugar dissolves. Add cucumber mixture, tossing to coat. Cover and chill 3 hours.
Great Summer Recipe, however, the 4 stars was due to the fact that it was a little sweet. I had to alter by adding some white vinegar and more black pepper. I will condense sugar to 2 tbsp. next go around.