8 potatoes, quartered and sliced 1/4 inch thick
2 red onion, sliced or sweet onions, sliced
1 1/2 teaspoons salt
1 teaspoon ground black pepper
1/4 cup butter
Preheat grill for indirect heat.
Measure out 2 or 3 sheets of aluminum foil large enough to easily wrap the vegetables, and layer one on top of the other.
Place potatoes and onion in the center, sprinkle with salt and pepper, and add butter. Wrap into a flattened square, and seal the edges.
Place aluminum wrapped package over medium heat, and cover. Cook for approximately 30 minutes, turning once.