Preheat oven to 350 F. and core your apples. Place them in a baking dish.
Sprinkle the divided cinnamon (approximately 1/4 tsp. in each apple) into each core hole in each apple, then fill with walnuts. (about 1 tbsp. in each apple)
Place a small pat of coconut oil (about 1/2 tsp. each apple) on top of each core over the walnuts.
Place the baking dish in the oven, and bake for 30-40 minutes, or until the apples are easily pierced with a knife. The skin should have some wrinkling in it. Remove from oven, and allow to cool a bit. Cut open and top with any sweetener you prefer, if any.
Please note that the nutrition data given here is a ballpark figure. Exact data is not possible. Data does not include any added sweeteners.