Wash the iceberg lettuce leaves thoroughly. Tear or chop them into bite-sized pieces and place them in a large salad bowl.
Wash the cherry tomatoes and cut them in half. Add them to the bowl with the lettuce.
Wash the cucumber. You can peel it if you like, or leave the skin on. Cut the cucumber in half lengthwise, then slice it into half-moon shapes. Add the cucumber slices to the bowl.