This beautiful zucchini soba salad with seared tuna is paired with wasabi mayonnaise and salmon roe for a healthy, flavorful dinner that looks beautiful.
Combine all ingredients for the mayonnaise except the water in a bowl. Whisk until smooth. Add a few teaspoons of water until the mayonnaise reaches a consistency that allows you to drizzle it easily. You will probably need 2-3 tablespoons. Whisk after each addition, being careful not to make the sauce too watery. Season with salt and pepper and set aside.
Prepare the Soba Salad:
Put the zucchini soba noodles in a large bowl and drizzle with soy sauce, mirin, and sesame oil and toss to combine. Taste and season with salt and pepper if needed. Divide the noodles between two plates. Place the fresh watercress on top of each plate and set aside.
Prepare the Tuna:
Heat 2 teaspoons of neutral cooking oil in the skillet over high heat until very, very hot.
As you wait for the skillet to become hot, brush the tuna with wasabi oil and season all over with salt and pepper. Arrange the sesame seeds on a plate and coat the tuna with the seeds.
Place the tuna in the hot skillet and cook for about 1 minute 30 seconds per side for rare. Transfer to a plate. Slice the tuna against the grain into thin slices.
To Serve:
Immediately place the sliced tuna on top of the watercress. Drizzle the entire dish with wasabi oil and spoon the salmon roe on top of the tuna. Sprinkle with shichimi togarashi. Serve immediately. Enjoy!
You will likely have leftover wasabi mayonnaise. Reserve it for another use.