Prepare the dressing: In a small bowl, whisk together the ginger, garlic, chilli, sesame oil, peanut oil, honey, soy sauce, and togarashi spice.
Marinate the tuna: Cut the tuna into medium dice (you want the cubes to hold their shape). Toss the tuna through the dressing until well coated. Set aside briefly while you prepare the vegetables.
Prepare the vegetables: Dice the avocado and cucumber, and slice the radish if using.
Assemble: To serve, spoon avocado into the base of small bowls, followed by cucumber. Top with the marinated tuna and drizzle over a little extra dressing.
Garnish: Finish with toasted sesame seeds, radish slices, and a wedge of li