In the barbeque particularly with chicken, potatoes etc. The whole head that is, dont separate the cloves but put in double foil and barbeque. Garlic will never be the same for you. Put the whole head in foil by itself or with other flowers. One flower wont be enough. You can squeeze the garlic out of the shells like butter. Put it on bread(garlic bread). The flavour this way is amazing.
Enjoy!