
These fondant-style sweet potatoes roast until caramelized on the edges and tender in the center, then soak up savory stock for extra depth. A warm maple pecan butter adds crunch, richness, and just enough sweetness for a holiday-worthy side dish.
Preheat the oven to 465°F (240°C), or 425°F (220°C) fan. Use a large roasting pan or rimmed baking sheet with sides high enough to hold liquid.
Peel the sweet potatoes if desired, then cut them crosswise into thick 1 1/4-inch (3 cm) rounds. Try to keep the slices even so they cook at the same rate.
Arrange the sweet potato rounds in a single layer in the pan. Drizzle with the melted butter and olive oil, then season with about half the salt and pepper.
Turn the rounds to coat both sides in the fat, then season with the remaining salt and pepper.
Roast for 20 minutes, until the bottoms are browned and beginning to caramelize.
Carefully flip each sweet potato round. Return the pan to the oven and roast for another 15 minutes.
Spoon the hot butter and oil from the pan over the sweet potatoes. Pour the chicken stock around, not directly over, the rounds, then add the garlic to the liquid.
Roast for 15 to 20 minutes more, until the sweet potatoes are very tender and most of the stock has reduced or been absorbed. If the pan still has a lot of liquid, give it a few extra minutes.
While the sweet potatoes finish roasting, make the maple pecan butter. Toast the pecans in a small saucepan or skillet over medium-high heat for about 30 seconds, stirring, until fragrant.
Add the maple syrup, butter, cinnamon, and a pinch of salt to the pecans. Once the butter melts and the mixture bubbles, reduce the heat to medium and simmer for about 1 1/2 minutes, until slightly thickened.
Transfer the roasted sweet potatoes to a serving platter, scraping up a little of the reduced pan juices with them. Spoon the warm maple pecan butter over the top and finish with fresh thyme leaves.
Use a metal roasting pan for the best browning; glass or ceramic pans may need a few extra minutes. Keep the sweet potatoes in a single layer so they caramelize instead of steaming. For a vegetarian version, use vegetable stock instead of chicken stock. The maple pecan butter thickens as it cools, so warm it gently before serving if making ahead.




