1 teaspoon powdered mustard, such as Coleman's, mixed with water to make a paste
few grinds of fresh pepper
1 tablespoon + 1 teaspoon grape seed oil (or other mild flavored oil such as canola)
1 tablespoon + 2 teaspoons sesame oil
Preparation
Lightly coat the ahi with grapeseed or canola oil. Season the ahi with a little kosher salt and pepper. Sprinkle furikake on all four sides of the ahi, patting gently so furikake adheres to the fish.
Heat a non-stick skillet over medium-high heat with a teaspoon of oil. Once hot, sear ahi on all four sides just until the coating is lightly browned, about 1 minute total.
Set aside to cool, then slice into ⅓-inch pieces.
In a medium bowl, combine soy sauce, rice vinegar and sugar. Stir until the sugar has dissolved. Mix in mustard paste and pepper. Add the minced onion and whisk in grapeseed and sesame oil.
Place sliced ahi over salad greens. Drizzle some of the dressing over ahi and salad greens just before serving. Leftover dressing is delicious drizzled over a tofu salad.
Recipe by My Lilikoi Kitchen at https://www.mylilikoikitchen.com/2015/08/29/furikake-seared-ahi-salad-with-nobu-matsuhisa-style-dressing/