Marinade tuna in the sake for a couple of minutes.
Then coat the tuna steak with the wasabi powder and the paprika.
Heat a frying pan and add the oil, season the tuna fillet with the salt, pepper and paprika, and place in the pan, sear for 1 minute each side, and leave on the side to rest for five minutes.
To make the salad slice the white radish into ribbons, add the pickled ginger, the coriander and dress with soy sauce.
Slice the tuna very thinly and put on the plate along with the salad.
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