In the historic church building you will find fishmongers peddling whole salmon, giant chunks of tuna, cod fillets, langoustines, crawfish, fresh crabs, pickled herring and anything else that once swam or scurried across the ocean floor.

BBC: Navigating Gothenburg??s culinary scene

When buying the cod, look for thicker fillets, which will be easier to keep intact when removing them from the poaching liquid.

NPR: Recipes: 'A Master Class'