Sophie Michell’s tuna with pink grapefruit and wasabi potato salad recipe

You can read the full recipe here: http://www.lovefood.com/guide/recipes/19716/tuna-with-pink-grapefruit-and-wasabi-potato-salad-recipe A fresh, healthy dish matching wasabi potatoes with grapefruit and flash-fried tuna steak. Sophie says: "The seared pink tuna, hot creamy wasabi and pink grapefruit are excellent together. It's a fusion dish I suppose, especially if you can find Japanese mayonnaise." Mizuna is a peppery green leaf, which also goes by the name of Japanese mustard.
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