The small town of Yerseke handles such a large share of the country's mussel trade that it's informally known as the mussel capital of the Netherlands.
Mussels farmed in Zeeland's tidal waters are steamed in a pot with celery, onion and white wine until they pop open, then served straight in the cooking pot with fries and mayonnaise on the side. Market stalls and harbourside stands around Yerseke and the Zeeland coast sell them fresh by the kilo in season.