strain sweet potato and add to pan with the sauce alonside sweet potato cooking water, cover and leave on medium-low for 20 minutes, stirring occasionally
[sweet potato cooking water: 0.25 cups]
make yogurt sauce with greek yogurt, lime juice, warm water, salt, ground black pepper to taste.
[greek yogurt: 1 cup; ground black pepper: some; lime juice: 1 tbsp; salt: 1 tsp; warm water: 1 tbsp]