Give your fish pie an update with a delicious sweet potato mash topping. The filling for this modern take on a comfort food classic is made from haddock, delicately poached in creme fraiche, then combined with mustard powder, dill and hard-boiled egg.
- Preheat the grill to high. Put the potatoes in a pan of boiling water and cook for 10 minutes. In a second pan of boiling water cook the egg for 8 minutes.
- Meanwhile, heat a little butter in a pan and gently fry the onion until soft. Stir in the crème fraîche and when the sauce is coming up to the boil, add the haddock pieces and simmer for 5 minutes until it is cooked through.
- Drain the potatoes then rinse the egg in cold water before peeling and cutting into quarters. Mash the potatoes with butter, season, then set to one side.
- Add the pieces of egg, herbs and mustard to the sauce and season with ground black pepper, then pour into an ovenproof dish. Top with the mashed potato, using a fork to rough up the top. Grill for 4-5 minutes until golden and bubbling then serve immediately on warmed plates.
Tip: The fish pie doesn't need to go in the oven, which makes it super-fast to cook. Make ahead for a relaxed midweek supper.
Freezing and defrosting guidelines
Once the dish has cooled completely, transfer it to an airtight, freezer-safe container, seal and freeze for up to 1-3 months. To serve, defrost thoroughly in the fridge overnight before reheating. Loosely cover with foil and bake until dish is thoroughly heated through. Reheat until piping hot.