Cod is often cooked like this in Portugal especially Lisbon. I love how easy it is as well as the creamy sauce and rich flavours.
All recipes changed a detail on my recipe when publishing which isn't right. You must fry the potatoes in a large (high) skillet with hot VEGETABLE OIL (enough to cover half the skillet or frying pan) just enough to cook inside, no more than 5 minutes. After this you must use a large casserole to sauté the onion in OLIVE OIL (ABOUT 1/4 CUP), not the same frying pan where you fryed the potatoes. Plus, you shall use cream, not Heavy Cream. - 04 Apr 2010 (Review from Allrecipes USA and Canada)
Here in Portugal we call it "Bacalhau com natas", a truelly fantastic recipe in my humble opinion, we have a special cheese called "Quijo da Ilha" its a very strong flavoured cheese, but if you cant find where you live, Parmesan will do just fine. Make sure you serve it with a good wine and nice tossed green salad. It makes indeed a lovely meal. - 14 Apr 2010 (Review from Allrecipes USA and Canada)
We liked this. This dish turns out like fish pie or lasagna. The flavor is creamy, not very salty and the combination of potato/cheese/fish/sauce is great. - 20 Dec 2010 (Review from Allrecipes USA and Canada)