1. Preheat oven to 220°C (200°C fan-forced).
2. To make the marinade,combine all ingredients in a bowl. Mix with the king prawns. Leave for an hour before cooking.
3. Place the sesame seeds for the dressing and dipping sauce on a tray. Toast for 5 minutes.
4. To make the salad,dissolve sugar and salt in the vinegar,then whisk in the 1 tsp of toasted sesame seeds, gochugaru and sesame oil. Season with sea salt and black pepper,then mix the dressing with the sliced shallot.
5. To make the dipping sauce,combine all ingredients (including the 1½ tbsp toasted sesame seeds) in a bowl and season to taste.
6. Barbecue or sauté the prawns over high heat in the vegetable oil until just medium rare inside and a little blackened or heavily coloured on the outside,about 5 minutes.
7. Place the prawns in a pile on a large platter and arrange with the vegetable accompaniments,lettuce leaves,chilli,sauces and steamed rice for people to make their own wraps at the table.
* Available in most Asian grocery stores.