1Pierce potatoes with fork. In large plastic food-storage bag, place potatoes and oil; toss to coat potatoes with oil. Sprinkle with salt and pepper. Wrap potatoes individually in foil. In 5- to 6-quart slow cooker, place wrapped potatoes.
2Cover; cook on Low heat setting 6 to 8 hours.
3Serve potatoes with remaining ingredients as toppings. Potatoes will hold on Low heat setting up to 2 hours.