Drain the tuna. Boil the eggs hard. Quench and let them cool down
Peel and chop the onion and garlic. Wash the basil and remove the leaves. Finely puree tuna with mayonnaise, vinegar, garlic, onion and 4-5 basil leaves. Season to taste
Peel and halve the eggs and serve with tuna cream. Garnish with capers, caper apples and the rest basil