Grilled Sweet Potatoes with Lemon-Herb Sauce

Ingredients

1/2 small red onion, finely chopped

2 tsp. grated lemon zest plus 1/4 cup juice

1 kg. Sweet potatoes [well-scrubbed and sliced into 1/4-in.-thick rounds]

3 tbsp. olive oil, divided, plus more for serving

Kosher salt and pepper

1 small chili, seeded and finely chopped

1/4 c. fresh mint, chopped

Plain Greek yogurt, for serving

Directions

1. Heat grill on medium. In small bowl, combine onion and lemon juice. Let sit, tossing occasionally.
2. In large bowl, toss sweet potatoes with 2 tablespoons oil and 1/4 teaspoon each salt and pepper.
3. Grill until slightly charred and tender, 4 to 5 minutes per side.
4. Into bowl with onions, stir lemon zest, chili and remaining tablespoon oil, then stir in mint. Makes 1/2 cup relish.
5. Spread Greek yogurt onto a platter and drizzle with oil.
6. Arrange sweet potatoes over yogurt and spoon mint relish on top.