Directions. Preheat oven to 375 degrees F. Lay the sweet potatoes out in a single layer on a roasting tray. Drizzle the oil, honey, cinnamon, salt and pepper over the potatoes. Roast for 25 to 30 minutes in oven or until tender. Take sweet potatoes out of the oven and transfer them to a serving platter. Drizzle with more extra-virgin olive oil.