2 pounds sweet potatoes, cut in 1/2″ chunks
1 small red onion, chopped
1 cup chopped celery
½ cup dried cranberries
1 tablespoon Dijon-style mustard
2 tablespoons mango chutney
1/2 cup plain or vanilla yogurt, or more to taste
2 tablespoons lemon juice or cider vinegar, or to taste
Steam the sweet potatoes until they are just tender, about 15-20 minutes. As soon as they are done, rinse them with cold water to stop the cooking and drain.
Meanwhile, combine the other ingredients in a serving bowl. When the sweet potatoes are ready, mix them in. Chill until ready to serve.