Method

• 1.
  Combine soy, mirin, sake, sugar, ginger and garlic in a ceramic dish. Add the tuna steaks and set aside for 30 minutes, turning once, to marinate.
• 2.
  Cook the noodles following packet directions, drain and refresh under cold water. Transfer to a bowl and toss through the sesame oil to prevent noodles from sticking.

• 3.
  Preheat a barbecue or chargrill plate. When it's very hot, add the tuna, reserving the marinade. Sear quickly for 1 minute each side. Set aside to rest.
• 4.
  Pour the marinade into a pan over low heat for 2 minutes until heated through.
• 5.
  Transfer noodles to a colander and pour over boiling water. Drain and return to bowl, toss in half the warm marinade.
• 6.
  To serve, divide noodles between serving plates, top with the tuna, pour remaining marinade over the dish. Garnish with sesame seeds and wasabi.