Wash and pat dry the potatoes. With a fork, pierce the potatoes all over.
Place them in a bowl and drizzle the oil, seasoning and salt and pepper over them.
With clean hands, spread the seasoning/oil mixture evenly over all the potatoes.
Cut three sheets of aluminum foil and wrap each potato in one piece of foil.
Place them in the slow cooker for 2-3 hours on high, or 6-8 hours on low.
After cooking time is up, check for doneness by inserting a fork. If the fork goes in easy, the potatoes are done. If there is a lot of resistance or the fork sticks in the potato and doesn’t want to come out easily, then it will need more time.
When the potatoes are finished, remove carefully by using oven mitts and open up the foil. Slice the potato lengthwise and dress with preferred toppings.