Seared Tuna on Soba Noodles

Cook soba according to directions, Drain, then rinse in cold water. Combine soy and mirin, then toss through noodles. Brush tuna with oil, then season, Heat a large, non-stick fry pan over high heat. When hot, cook tuna for 20-30 seconds each side until lightly coloured but still completely rare inside. Remove from pan and cut into 5 mm-thick slices. Divide the noodles among plates, then top with spinach, broccolini and tuna.