Serves: 4 Ingredients 2 large sweet potatoes, scrubbed and cut in half lengthwise 4 sheets heavy duty aluminum foil 1 Tbsp. plus 1 tsp. unsalted butter 1 Tbsp. plus 1 tsp. brown sugar Instructions Prepare grill. Arrange sweet potato halves cut side up on individual sheets of aluminum foil. Sprinkle with salt and pepper to taste, dot with butter and sprinkle with brown sugar. Wrap tightly. Grill 45 minutes, turning frequently until potatoes are tender.