Cook potatoes until done and set aside to cool while the rest of the salad is assembled
In a large mixing bowl, whisk ginger, lime juice, dairy-free yogurt, mayonnaise, mustard and curry powder
Taste and add agave to taste
Add sauce to diced celery and red bell pepper
Gently fold in cooked sweet potato
Season with fresh black pepper
Refrigerate salad for a few hours
Serve chilled