To make ahead: the components (including the dressing) will keep well stored separately in the refrigerator for a few days. If you’re short on space and containers, you can store the cucumbers and tomatoes together, with the radishes placed on top. Leftovers are still delicious, but it’s best dressed at the last minute (try to dress as much as you think you’ll eat right away).
Find it online: https://cardamomandtea.com/584/watermelon-wedge-salad/