The Food Lab: The Best Roasted Sweet Potatoes
J. Kenji López-Alt
a 350°F (180°C) oven and baked until tender
to make the most of this effect, you’ve really only got to cook them in a temperature-controlled water bath at 150°F (66°C) for one hour before baking
The par-cooked potatoes were significantly sweeter and more flavorful than the plain roasted potatoes, which were starchy and bland.