I use these handy fresh "fish pie mix" packs from the fish section of the supermarket. They are basically an equal mix of chopped salmon, cod and smoked haddock. You can buy the fish individually if you wish, but this just makes life easier after a day at work!
This served the two of us generously with one portion of leftovers for Toby. It could feed 4 if you added a bit of extra fish or a side dish.
This is 100% my own recipe. I used to make a white sauce for the base of this dish, which worked well, but after once realising we had no flour to make the sauce I had to improvise with some creme fraiche and white wine. Now I've discovered this short cut I'll never bother with making a white sauce again!
So here's the deal:
Place the fish pieces in an ovenproof dish. Add one handful of frozen peas and/or one handful of frozen sweetcorn. Add 2 heaped tbsp creme fraiche, a generous splash of white wine, and some chopped fresh parsley and tarragon (approx 1 tbsp of each). Season. Stir to combine.
Top with mashed potato (made with 4 medium sized potatoes, cooked and mashed with butter, milk and salt and pepper). At this point it's up to you whether or not you top it with grated cheese. Some people are uncomfortabe with the combination of fish and cheese but we like it!
Cook in the oven for 20-25 minutes. Check that the fish is cooked through (it should be opaque and just starting to flake but not be too firm). Serve with some fresh green beans .... and perhaps a nice chilled white wine. Fish on a Friday. Perfect.