I was thinking of cooking a fish curry for some friends (probably the Rick Stein madras one - can't link as on phone but it's a tomato and tamarind base). He talks about using great, fresh fish in the recipe blurb. But I am on a bit of a budget drive and have some Sainsburys basics white fish fillets in the freezer. Does anyone know if they will work or if this is one of those dishes where the quality of ingredients really matters?