3 or 4 lg. potatoes, pared
1 sm. onion, chopped
1/2 lb. (2 c.) white American cheese, cubed
1/2 c. butter

Slice potatoes onto a big piece of heavy duty foil and sprinkle with salt and pepper. Add onion and cheese cubes. Slice butter over all. Mix on the foil; bring edges up; leave a little space for expansion steam; seal well with double fold. Place package on grill. Cook over coals about 1 hour or until done, turning several times.