Kosher salt and freshly ground black pepper, to taste
½ cup yogurt
½ cup mayonnaise
¼ cup Thai basil leaves, minced
2 tablespoons minced chives
2 tablespoons lime juice
2 teaspoons lime zest
½ teaspoon ground turmeric
1 celery stalk, minced
1 garlic clove, finely grated
1-inch piece ginger, peeled and finely grated
Directions
Light a grill. In a large bowl, toss the sweet potatoes with the olive oil, salt and pepper. Grill the potatoes, flipping once, until cooked through and lightly charred, 15 to 20 minutes. Transfer to a cutting board and let cool, then roughly chop.
Meanwhile, stir together the remaining ingredients until combined. Add the cooled sweet potatoes and toss to coat. Transfer to a serving bowl and either serve at room temperature or chill for 1 hour before serving.