I like using them in salads but my favorite radish use is in sandwiches. These radishes are sweet at first and then they have a slightly hot, peppery flavor. I just slice them up and put as many as I can between two slices of bread loaded with mayonnaise. I always add lettuce. These make great tea sandwiches, too.
Interestingly, the green leafy tops can be cooked and eaten just like turnip or mustard greens. I saved mine to try in a dish before the week is out. I think they are quite strong so a little will go a long way. They would probably be better used with another green or added to a stir-fry.
I think radishes make a beautiful type of spring bouquet and a very pretty garnish.