Cleaning a grill with an onion makes the grilled food super tasty.
Seriously.
There are a multitude of unique things to do on the grill. Here are a few ideas:
1. Grill entire sandwiches.
2. Slice open a banana peel and fill it with marshmallows. Then grill it.
3. Stick a bunch of sliced vegetables in tin foil and toss some fish in it.
4. Cook pizza on a BBQ grill.