Heat the oil in a wok (or large pan). Sauté the onions, garlic, and onions until the onions are translucent. Add curry powder, chili powder, tumeric (turmeric), cinnamon and season to taste. Let simmer gently for about 3 minutes. Add the wine and lemon juice. Reduce by half. Stir in coconut cream (milk). Bring to a boil. Let simmer for 5 minutes. Add king prawns to the curry mixture. Simmer for about 3 minutes until prawns are ready.