Wash all produce and dry
Peel cucumber
Cut the cucumber into slices and then halves
Place cut cucumbers in a large bowl
Chop tomato into large bite-size pieces
Place tomato chunks into the bowl too
Cut onion in half and peel one half
Cut half of the peeled onion into thin slices
Add onion to bowl
Open can of beans and drain water
Add 1/2 cup of beans to bowl
Add 1/4 cup dressing to bowl of cut veggies (or more if desired)
Stir all ingredients together to mix well and coat with dressing
Serve at room temperature or chilled