By Adam Bloodworth THE WEEKEND If you are seeking a truly world-class culinary experience, you can do no better than spend a long weekend in and around Girona in the Catalonia autonomous community of Spain. The city’s restaurants have 18 Michelin stars between them, and at the other end of the budget spectrum there are fantastic markets and a rich tapas scene bursting with Catalan delicacies such as Arròs Negre (cuttlefish in squid ink) and Calçots (spring onions grilled over an open fire and dipped in Romesco sauce). The Mediterranean and its seafood riches are only half an hour’s drive away,…