Fresh tuna has a ... if it's lightly seared so it's almost raw, and still a deep pink inside, but if you like it more cooked, leave it in the pan for longer. Make the sauce first.

If you don't want to use the kombu, or don't have the time, brush the fish with soy sauce before searing it ... When the skillet is very hot, place the tuna fillets in it and sear them one side ...

Place the tuna slices on the vegetables (28), then garnish with the purple cabbage sauce. Finish with a drizzle of oil and a sprinkle of bottarga (29). The seared tuna with winter ratatouille is ...

1. Cut the tuna into very fine dice and combine in a bowl with the hot sauce, soy sauce, mayonnaise and sesame oil. 2. Scoop ...