Boil eggs in boiling water for about 10 minutes until hard. For the vinaigrette, whisk vinegar, salt, pepper, mustard and honey. Add oil drop by drop to the vinaigrette. Chop half the capers and stir into the vinaigrette.
Clean, wash and pluck the salad into bite-sized pieces. Quench the eggs, peel and halve them. Clean, wash and thinly slice spring onions. Arrange salad, spring onions, eggs, remaining capers and tuna on plates.
Drizzle with vinaigrette.