^ Tell me if I'm wrong, but it looks like you have butterflied the breast without giving it a good whack with a hammer (to tenderize and keep juicy), then added some chopped garlic too.
You have to insert the garlic through incisions because you'll just end up with burnt charcoal garlic bits as your pic shows.
...and skin side down first.
Not moaning, just giving some unofficial Bogon tips.