- Combine the teriyaki, egg whites, and sesame oil in a bowl and whisk to combine. Place the ahi steak in this mixture and coat well.
- Roll the steaks in the sesame seeds until well coated.
- Heat oil in a skillet and sear the ahi on all sides, making sure to lightly brown the sesame seeds but not cook the fish all the way through. Remove the fish from the heat and set aside to cool.
- Using a mandolin or a vegetable peeler, shave the daikon and the cucumber into very thin strips.
- Heat a griddle or a skillet and griddle the cut side of the bread until golden brown and crisp.
- Thinly slice the fish.
- To assemble, spread each side of the baguette with the wasabi sauce. Layer the bottom with fish, cucumber, radish, onion, sprouts and finish with the top of the baguette.