What to do:
Preheat the oven to 425F degrees.
Scrub, wash and dry the potatoes.
Carefully slice the potatoes into 1/8” slices without slicing all the way through.
Arrange the potatoes on a baking sheet, drizzle with the olive oil and sprinkle with salt, pepper and garlic powder.
Place a few springs of rosemary into the slits of the potatoes.
Brush the melted butter onto the tops each potato.
Bake for 45 to 60 minutes, depending on the size of your potatoes.