Rinse the monkfish and pat dry with kitchen paper, then cut into large chunks. In a large bowl, mix together the garlic and paprika with some salt and black pepper, then add a few drops of the oil. Chuck the fish into the bowl with this mixture, turning it over to coat it. Leave for about 20 minutes so that the flavours are absorbed.
Heat the oil — what’s left of it — in a large saucepa