1) Rinse the spinach thoroughly and drain. Transfer it to a large salad bowl.
2) Drain the tuna and flake it with a fork. Peel the boiled egg. Cut them into quarters.
3) Wash the apple and finely cut it into strips. Transfer the chopped celery and apple to the bowl of spinach.
4) Combine the olive oil and red wine vinegar. Season with pepper and salt. Drizzle this onto the the spinach and toss well.
5) Divide the spinach, celery, chopped shallots and apple over deep plates. Top with the flaked tuna and egg quarters. Finish with the pink peppercorns.
6) Serve the salad cold.