Tuna: Raw tuna steak, tsp of soya sauce, 1/2 tsp of fish sauce + sesame oil, sesame seeds.
Sauce: 1 tbsp sashimi soya sauce, 1/2 tsp of sesame oil.
Cut tuna into approx 5 cm wide logs. Marinate the tuna in everything but the sesame seeds. Toast sesame seeds in a dry pan, remove and set aside. Pan fry tuna in a HOT pan with a little oil (must be hot in order to have a decent crunchy crust). about 20-30 secs each side (all 4 sides, 6 if you want). Roll in sesame seeds to coat. Slice on angle. Mix the soya sauce and sesame oil together to make sauce then spoon over sliced tuna.
This was only 1/3 of the tuna steak.
Borrowed a stack of cookbooks from the library today. Off to read them now =) Still waiting for Luke Nguyen's one to be available. But Jamie's Ministry of Food will do for now.