Cut celery into 10 pieces of approx. 7 cm long, wash, cook in boiling salted water for approx. 3 minutes, drain and let cool. Drain tuna, finely mush, stir in mayonnaise.
Season to taste with salt and pepper and fill into a piping bag with star-shaped spout. Wash and drain the lettuce leaves. Cut brown bread into 5 strips each. Spray mini-spots of cream on top. Spread the lettuce leaves and celery on top (so they don't slip easily).
Spray the rest of the cream onto the celery as spots. Finely chop the nuts and sprinkle over. Garnish with salmon caviar.