Preheat oven to 400 F and line a baking sheet with parchment paper and grease with olive oil.
Slice sweet potatoes into 1 inch rounds.
Place rounds onto baking sheet and brush them with maple syrup and sprinkle with cinnamon.
Cover the baking sheet with foil and bake for 12 minutes.
While the sweet potatoes are baking, add the pecans, maple syrup, and cinnamon to a bowl and mix well.
Take the potatoes out of the oven and peel back the tinfoil. Flip each sweet potato round to the other side.
Add a spoonful of pecan mixture to each one. Cover with foil and put back in the oven for another 12 minutes.
Remove the potatoes from the oven and ensure they are fork tender, if not, bake for another few minutes.
Add about 3-4 mini marshmallows to the top of each potato. Turn the oven to broil and broil the sweet potatoes for about 30 seconds to 1 minute. Watch carefully as they will brown quickly!
Remove from the oven and let cool. Serve on a platter and enjoy!
