Portugal's custard doughnuts that sell like hot cakes

Bolas de berlim are creamy filled confections that sell out twice a day in the small Portuguese port town of Viana do CasteloLate afternoon in the pretty town of Viana do Castelo on the north Portugal coast and a long queue of people wait patiently outside Pastelaria-Confeitaria Manuel Natário, an unassuming tea shop in the city centre.The object of their desire? The bolas de berlim (a Portuguese take on the custard-filled Berliner doughnut) are famous here – some say the best in th