Peel and slice your sweet potato. I recommend no thicker than 1/4 inch. But really, more important that thickness is that all the pieces are uniform in thickness, otherwise they won't all bake at the same rate.
In a pot, melt the butter and mix in the maple syrup, cinnamon and salt.
Place the sweet potato hearts in the pot and stir to coat the hearts.
Pour into a small casserole dish and bake at 350 F. for approximately 30-40 minutes or until the potatoes are soft and cooked through.
Allow to cool a bit, salt as needed and serve.
Please note that the nutrition data given here is a ballpark figure. Exact data is not possible.