Preheat oven to 375 °.
Cut the sides and ends from each potato, creating an evenly proportioned rectangle with most of the skin removed.
Cut potatoes into 1/8" slices.
Place 4 groups of slices on a baking pan and slightly fan the potatoes in a straight line, exposing 1/5 of each potato slice.
Evenly cover potatoes with butter, salt, spices, and herbs.
Bake uncovered until tender and golden brown, about 40–50 minutes.