If you don't have a barbecue, you can cook these potatoes in foil in the oven. Preheat your oven to 450°F. Put the foil-pack potatoes on a baking sheet (to prevent spills) and bake for 20 to 25 minutes or until fork tender. Remove the baking sheet from the oven, very carefully open the foil packs (they will be steaming) and sprinkle with blue cheese crumbles. Cook for 5 minutes more until the cheese has melted.