Wash clean, remove eyes and dry potatoes. Cut into quarters. Place on the microwave plate with a sheet of baking parchment. Mix them around with melted butter, sea salt, black pepper and a few sprigs of rosemary. Use setting for 1 baked potato (about 12 mins), or until done. If having a BBQ, you can do this then place on tin foil on BBQ to get a smoky flavour. Saves time, cooker space, oven space etc.