Watermelon radishes have a green exterior and a fuchsia interior. Other varieties are fully red, pink, purple, or even black. Although different colors correspond to slightly different shapes and sizes, they all share a crisp texture and a spicy flavor and can be used interchangeably.
Radishes that feel soft or look wrinkly will probably be spongy inside. Choose bulbs that are smooth, with perky leaves. Store radishes in a plastic bag in the refrigerator for up to 1 week with the leaves removed. (Otherwise they will draw moisture from the roots.)
Recipes by Julia Levy