01 - Preheat oven to 400°F. Scrub sweet potatoes, pierce each several times with a fork, and place on a lined baking sheet. Bake for 45 to 50 minutes until tender.
02 - While sweet potatoes bake, melt butter in a skillet over medium heat. Add diced apples, cinnamon, nutmeg, and a pinch of salt. Sauté for 5 to 6 minutes until apples begin to soften.
03 - Stir walnuts and maple syrup into the apple mixture. Cook for 2 minutes more, then remove from heat.
04 - When sweet potatoes are cool enough to handle, make a slit lengthwise down the center of each and gently open. Fluff the interior with a fork.
05 - Spoon the apple-walnut mixture evenly into each sweet potato. Top with dried cranberries and chopped parsley if desired.
06 - Serve warm as a main course or hearty side dish.