Preheat oven to 400℉.

Place potatoes directly on baking sheet in the center of the oven.  Bake for 1 hour or until you can stick a fork all the way through. Remove from oven and let cool.

Cut sweet potato in half, gently scoop out most of the flesh leaving a thin layer of potato on skin.  Place the skins back on the baking sheet and drizzle with olive oil.  Roast in oven for 15 minutes until beginning to crisp.  

In a bowl mix feta or blue cheese with kale and some or all of the sweet potato flesh if desired.  When skins are crispy fill with mixture. Top with pecans and/or chives if using.  Place back in oven for 5 minutes.