2 large onions, finely sliced
Extra virgin olive oil (EVO)      
500g Paneton ready rolled flaky puff pastry, thawed
300g can Callipo yellowfin tuna in oil, drained and flaked
Salt and freshly ground black pepper
10 El Navarrico whole piquillos, halved
6 small vine-ripened tomatoes, sliced
10 Ortiz anchovies    
2 hard...