Bake the potatoes. In the oven, or in the slow cooker.
Slice the potatoes in half lengthwise and scoop out the flesh.
Make mashed potatoes with the butter, sour cream, garlic powder with some salt and pepper to taste.
Spoon the mashed potatoes back into the shells. Top with shredded cheese.
Place the shells onto a grill skillet or mesh basket and place over indirect heat on the grill for 10-15 minutes, or until cheese has melted.
Serve alongside your favorite grilled meats and grilled corn.