Zucchini and summer squash that are large in diameter should be halved or quartered lengthwise before being sliced.
Radishes will color other foods, so leave them out when preparing this recipe in advance. Cover the salad and refrigerate it for up to 2 hours. Just before serving, add the radishes.
Line a salad bowl or shallow platter with colorful greens such as kale or red leaf lettuce. Mound the salad atop the greens and garnish it with whole radishes with stems.