Preheat the oven to 425 degrees F. Place the potatoes on a baking sheet and pierce them a few times with a fork, all over. Roast the potatoes for 60 to 75 minutes, until they are soft enough to cut through.
While the potatoes are roasting, make the vinaigrette. Whisk together the cranberry sauce, vinegar, parsley, garlic, mustard, honey and a pinch of salt and pepper. Stream in the olive oil while whisking until the dressing is emulsified.
Add the pecans to a skillet over medium-low heat. Cook, stirring often, until the pecans toast and become fragrant. Transfer them to a cutting board and coarsely chop them.
Heat the pancetta in the same skillet over medium heat. Cook, stirring often, until the fat is rendered and the pancetta is crispy. Remove the pancetta with a slotted spoon and place it on a paper towel to drain excess grease.
Once the potatoes are done, slice them down the center and gently mash the inside with a fork. You can add a sprinkle of salt and pepper in there too. Stuff the potatoes with 1 or 2 ounces of goat cheese. Return the pan to the oven for 5 to 10 minutes.
Take the potatoes out and drizzle them with the cranberry vinaigrette. Top with the pecans and pancetta and extra fresh parsley if desired. Serve!