In a medium saucepan bring the following to a simmer: 400 ml total fish stock and / or shellfish stock. 100 ml whole milk.
100 ml cream.
35 ml white wine.
35 gm butter.
¼ dozen pieces total of chopped parsley and / or dill.
And ‘some’ of the following if desired:
100 ml of chicken stock claim juice or clear vegetable stock.
75 ml of bonito stock.
A few splashes of brandy or sake.
A few splashes liquid smoke.
A few splashes of sweet soy.
A few splashes of fish sauce.
A few splashes of Worcestershire.
A few splashes of xo.
½ teaspoon mustard.
¼ teaspoon miso.