Wash cucumber or radish thoroughly and slice thinly.
Put the cucumber or radish in a bowl, sprinkle lightly with salt, and let it sit for a while.
Rinse the salted cucumber or radish in cold water and drain well.
Mix lemon juice, vinegar, olive oil, and pepper to make a dressing.
Add the dressing to the cucumber or radish and toss gently.
Transfer to a dish to finish.