In this instructable, you will need an oven, baking sheet, cutting board, kitchen knife, olive oil, basting brush, and a medium sized Japanese sweet potato.
Preheat oven to 400 degrees.
Rinse, dry and cut sweet potato lengthwise as evenly as possible.
Place potato halves on baking sheet and pour I/2 tablespoon olive oil on the cut side of each piece.
Spread olive oil on the cut side of each piece with the basting brush. Turn both sides over and brush the skin side, spreading the oil evenly.
Place baking sheet with potatoes face down on top shelf for 1/2 hr.Turn potatoes over and return baking sheet to oven. Bake another half hour. Remove baking sheet from oven and serve potatoes immediately. Enjoy !