Cut 4 pieces of aluminum foil large enough to hold ingredients. Place 1 potato per packet on each piece of foil. Add broccoli, onion, butter, and salt and pepper.
2
Place on hot grill on second rack, or place in 375 degrees F oven. Cook for 50 minutes or until potatoes are tender.
3
Carefully add cheese, and let cook for and additional 10-15 minutes or until cheese is melted.