Sweet Potato Salad

Place sweet potato, green pepper, celery, scallions, and walnuts in a small salad bowl. Stir together mayonnaise, yogurt, lemon zest and juice (about 3 T.), and salt. If you're fond of fresh ginger, try it in this dish: peel it, cut in three pieces, and press the pieces in a garlic press to extract the juice. (It will well up in the upper part of the press--pour from there, loosen with a fork, and squeeze again.) Mix the juice into the dressing, adding to taste. Combine with sweet potato mixture and adjust salt and lemon juice to taste. Makes 3 cups, to serve 4.