Saffron cod

Very simple: a few sliced new potatoes, a tomato, plenty of butter, a couple of lemon wedges, water, white wine, salt, pepper and a pinch of saffron. Cook over a low heat until the potatoes are nearly done, then add cod fillets and cook for another 8-10 minutes. Take the fish out, if need be, to reduce the remaining liquid to a sauce. More butter.

I've often thought this would work well with chicken, too, but have never got round to trying it.