Preheat oven to 350°. Put your oven rack in the middle of the oven.
Pour the tablespoon of olive oil in your hands and rub all over the potatoes. Place potatoes on the oven grate and bake for 30 minutes at 350° (Test for doneness by inserting a paring knife into the thickest part of the potato. If it slides in smoothly, then the potatoes are done).
Remove the potatoes from the oven and let cool completely.
Cut the potatoes in half, lengthwise. Gently scoop out the potato, leaving about 1/4 inch of potato on the skin.
Line the scooped out potato skins on a baking sheet.
When ready to bake, slice the halves of potatoes into quarters. Line up the potatoes on a baking sheet.
Using a pastry brush, brush the inside of the potato skins with the teriyaki sauce. Place in the oven and bake for 5 to 10 minutes at 350° or until the skins are crispy.