Peel and cut the sweet potatoes into 2cm thick slices, lay them on a large sheet of foil keeping the slices together.
Glug lots of olive oil and sprinkle some thyme leaves and salt and pepper over them.  You could have one foil parcel for the kids so leave out the dried chilli. In the grown-ups parcel liberally sprinkle the dried chilli with the thyme.
Wrap the foil tightly round the potatoes, 2 potato per parcel.
Put the parcels in the hottest part of the bbq and cook for about 45 mins.
DELICIOUS.

For the Jerk Chicken all you need is some chicken drumsticks and chicken thighs, a bottle of Jerk BBQ sauce (Levi Roots or Walkerswood from Waitrose is the best), some olive oil.  
Heat the olive oil or sunflower oil in the oven, (220°, 200°fan oven) add the chicken pieces until brown all over, then add the sauce and put them back in the oven to get sticky and delicious for 30 minutes.
Eat with rice and the spicy sweet potatoes, with a corn on the cob, and turn up the Reggae music.