Baked sweet potatoes

I love sweet potatoes. This is a simply perfect way to prepare them.

Ingredients
sweet potatoes
vegetable oil

Preparation
Preheat the oven to 350F. Line a baking sheet with aluminum foil.

Wash the sweet potatoes and cut off the ends. Stab them on a few places with a sharp knife. Rub with oil.

Place the potatoes on the baking sheet and bake for 30 minutes in the 350F oven. Then increase the temperature to 400F and bake for further 40 minutes.

Remove from oven, peel, slice, serve.