The annual kräftskiva, or crayfish party, is an August highlight in Sweden. Because the summers are so short, it feels right to mark the arrival of locally caught crayfish with a convivial affair full of salads, snaps (shots of aquavit or similar spirit) and silly hats. In Britain crayfish can be found at some fishmongers and numerous online suppliers. Dill crowns, the flowering part of the fully grown plant, are commonly found at farmers’ markets in Sweden but less readily available elsewhere. You can grow them at home or source them from specialist suppliers who stock edible flowers. Fennel fronds or dill fronds would make good alternatives.