With a scoring tool, or knife, strip lines into cucumber skin. Slice cukes into circles, about 11a inch thick. Cut red onion into halves, leaving the root end intact. Slice onion halves across, making semi-circles that will separate. Cut top from bell pepper and cut into strips, about as wide as your finger. Cut stems from the tomatoes and cut in half. Slice each half into semi-circles, getting four cuts per tomato half.