Preheat the oven to 400°F (200°C)
Wash and scrub the sweet potatoes
Pat the sweet potatoes dry
Pierce each sweet potato several times with a fork
Place the sweet potatoes on a baking sheet
Rub with a little oil if desired
Sprinkle with salt if desired
Bake for 45 to 60 minutes
Check for doneness by inserting a fork or knife
Remove from the oven
Let cool for a few minutes before serving