Making do with what you've got

[desperance]

I wanted to make a fish pie tonight (comfort food!), despite having no milk for the sauce and no potatoes for the topping. So I poached the fish with mushrooms in a velouté made with fish stock and cream, and topped it with parsnip and celeriac mash; and y'know what? Of course you do. Best. Fish. Pie. Evar.