After you’ve washed them, cut sweet potatoes into them into equal sized pieces.
Either in a large bowl, or on the baking sheet that you plan to use to roast, toss sweet potatoes with oil, chili powder, garlic powder, onion powder, cumin, sea salt, and black pepper.
Roast sweet potatoes on a sheet pan, flat side down, flipping halfway through, for about 22-26 minutes, until tender all the way through and nice and caramelized on both sides.