Use a sharp knife to slice your potatoes about every half inch but not all the way through, stop about a quarter inch from the bottom. Then cut a stick of butter into eighth of tablespoon lumps, shove those into the slices to hold your tater open. Now drizzle with olive oil and some Adobo Seasoning (or whatever you prefer), like this :
Place on a baking sheet in a pre-heated 400' oven for 45-60 minutes. My spuds were pretty small so 45 minutes was perfect. When they are finished the seasoning on the top will be crunchy and the oiled skin will be nice and crispy as well.
Give it a try and let me know what you think, I'll definately be making these again!