Combine all ingredients, excepting the cheese and green onion, in a large bowl.
Place ¼ of the mixture on each foil square, then fold up the tinfoil so that the mixture won't leak while turning the packet over the fire.
Place on a BBQ grill or the grate over a campfire and cook for 20-25 minutes, turning the packets occasionally so that everything is cooked evenly.
When the chicken has been cooked thoroughly, remove from the fire and cool slightly.
Turn out the foil packets onto a plate, top with cheese and green onion.
