Another fantastic way to prepare jumbo prawns in a really in a really healthy way is to cook the prawns in a wok. Wok cooking is perhaps our most favorite way of preparing any food.
As an aside, if you want a great book really showing the spirit of wok cooking check out this great book on how the history of woks, how they are made, and why properly prepared wok cooked meals are incomparable :
The Breath of a Wok: Unlocking the Spirit of Chinese Wok Cooking