Best Baked Sweet Potatoes

Directions

1. Adjust oven rack to middle position and heat oven to 425 degrees.
2. Prick with fork 3-4 times. Place potatoes on a plate and microwave until potatoes yield to gentle pressure and centers register 200 degrees, 6 to 9 minutes, flipping potatoes every 3 minutes.
3. Wrap a rimmed baking sheet with aluminum foil, set a wire rack on top, spray rack with vegetable oil spray.
4. Using tongs, transfer potatoes to the prepared rack and bake for 1 hour (exteriors of potatoes will be lightly browned and potatoes will feel very soft when squeezed). 
5. Slit each potato lengthwise; using a clean dish towel, hold ends and squeeze slightly to push flesh up and out.

Source
https://www.cooksillustrated.com/recipes/9903-best-baked-sweet-potatoes