4 large Russet, Idaho, or Yukon Gold potatoes
2 Tablespoons extra virgin olive oil (or melted butter or equal parts of each)
Freshly ground pepper
Preheat oven to 425 degrees F. Leave potato skins on, or peel, your choice. Place the potato in a large wooden or metal spoon, and using a sharp knife, make slices across the potato the short way, about an 1/8th inch apart. Gently cut down to the lip of the spoon, not all the way through the potato. The slices should stay connected at the bottom, and the spoon helps keep the depth even.
Slice all the potatoes in this manner and place them cut side up in a lightly oiled shallow baking dish or stone. Brush potatoes with half the oil, and sprinkle with salt, pepper, and paprika, or your favorite seasonings.
Bake for 35 to 40 minutes. Remove from oven and brush the remaining oil on the potatoes and season with a little more salt, pepper, and paprika. Return to the oven and bake another 20 minutes, or until they are nicely browned.
Note: Hasselback potatoes may be topped with grated cheese and dried bread crumbs, as well as other variations.