Whisk together 2 tablespoons of the vinegar, the almonds, 1 teaspoon soy sauce, the ginger, honey, half of the spring onions and some pepper. Toss with the coleslaw mix and set aside.
Mix together the remaining spring onions, vinegar and soy sauce, the mayonnaise, sesame oil, tuna and some pepper. Divide evenly among the slices of bread. Cut the avocado into thin slices, and fan a quarter of avocado across each sandwich. Garnish with the sprouts. Drizzle lightly with vinegar and sprinkle with pepper.
Toss the oranges with the five-spice. Divide the sandwiches, slaw and oranges evenly among four plates. Serve with milk.