Before serving, remove any mussels or clams that are still closed. Heat oil in a large Dutch oven over medium-high. Add linguiça; cook, stirring often, until fat just starts to render ...

Add the green chilli and garlic and chop them in the butter. Set aside. To make the haddock with mussels and clams, pour the wine into a deep casserole with a tight fitting lid. Discard any ...