Preheat oven to 400. Rub the potatoes with canola oil and place on a baking sheet. Cook for approximately 45 minutes, until the potatoes are tender and cooked through. Remove from the oven and allow them to cool enough to handle.
Cut the potatoes in half lengthwise and scoop out some of the flesh, making sure that you leave at least a ¼ inch border around the outside. Brush the inside and the outside of the potato skins with melted butter and sprinkle with salt. Place cut side down on a baking sheet and return to the oven for 7 more minutes to help the skins crisp slightly.
Remove potato skins from the oven and fill with pulled pork. Top with grated cheese and return to the oven for a few more minutes to melt the cheese.
Once the cheese is melted, remove from the oven. Serve immediately, garnished with sour cream, green onions, crumbled bacon or ranch dressing.