Centolla gratinada
Centolla, the southern king crab hauled from the cold waters of the Beagle Channel, is Ushuaia's pride, and seafood restaurants along the harbour serve it gratinada: sweet chunks of leg meat in a light white sauce, crowned with cheese and browned under a fierce grill. It is rich, so serve it in small dishes as a starter with lemon and a green salad, plus crusty bread for anyone who can eat gluten. Buy cooked, frozen king crab legs or meat and thaw them in the fridge overnight; if you ever cook crab yourself, it must be alive when it goes into the pot. A frequent mistake is a sauce so thick and cheesy that the delicate crab disappears; keep it pourable and the cheese thin. Chef's tip: fold the crab in gently at the end, in big pieces, and let the oven only heat it; it is already cooked and turns stringy if it boils.
Argentinian
