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 or until tender.
02 - While sweet potatoes bake, melt butter in a skillet over medium heat. Add diced apples, ground cinnamon, nutmeg, and salt. Sauté for 5 to 6 minutes until apples are just soft. Stir in walnuts and maple syrup, and cook for 2 minutes longer. Remove from heat.
03 - Once 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.
04 - Spoon the apple-walnut filling evenly into each potato. Top with dried cranberries and chopped parsley if desired.
05 - Serve warm as a main course or substantial side dish.