Preheat the oven to 400°F (200°C)
Wash and scrub the sweet potatoes
Pat them dry
Peel them if desired
Cut into cubes, wedges, or leave whole
Toss with oil
Add salt and any desired seasonings
Spread in a single layer on a baking sheet
Roast for 25 to 45 minutes, depending on size
Flip halfway through for even browning
Check for tenderness with a fork
Remove from the oven when soft and caramelized
Serve immediately