Preheat your oven to 400°F (200°C).
Wash the sweet potatoes thoroughly under running water.
Pat them dry with a paper towel.
Prick the sweet potatoes several times with a fork.
Rub the skin with olive oil for extra flavor.
Sprinkle with salt and pepper.
Place the sweet potatoes on a baking sheet lined with foil.
Bake in the preheated oven for 45-60 minutes, until tender.
Check doneness by inserting a fork; it should glide in easily.
Remove from the oven and let cool slightly before serving.