I made Annabel Karmel's fish pie recipe this evening from her 'Super Foods' book. However by the time I finished poaching the fish the sauce had a distinctly curdled look to it - tasted OK though - but I don't know why.
I fried the onion and tomato in sunflower oil as opposed to the stated butter. Added the fish, covered with milk (it was only semi-skimmed not full-fat) added bay leaf and parsley and simmered for 4 mins.
Was it the oil? Was it the semi-skimmed milk? Should I have heated the milk first?
Any ideas?