In a large pot, fill with water and boil your potatoes. Cook for 15 minutes until tender and then drain. Peel the skins off (they should easily slip off using your hands).
Mash the potatoes with a potato masher and then mix in the butter, pinch of salt and Dijon mustard, thoroughly. Set aside.
In a pan, add the fish to the milk and allow to simmer for a couple of mins on low heat and then add in black pepper, dried parsley and oregano. Cook gently for a further 2-3 minutes.
Scoop the fish fillets out of the milk and add these to the casserole/oven dish. Use a fork to flake these in the dish and spread evenly.
Finely dice the spring onions/scallions and add these into the pan with the milk and herbs, along with the peas and sweetcorn. Cook these for approximately 3 mins on low heat. Pour this mixture on top of the flaked fish in the casserole/oven dish.
Add the mashed potatoes and spread evenly in the oven/casserole dish.
Top the mashed potatoes with the mature cheddar cheese, evenly, and place this in the oven for 30 mins. Take out of the oven and allow to cool for a few mins before serving and then enjoy.
Notes
You can substitute the smoked haddock for any other smoked fish. It is recommended that the fish is smoked to ensure that the full flavour profile of this recipe is achieved.
Use lighter mature cheddar cheese if you want to reduce the overall calorie count.
Keyword Easy, Fie Pie, Fish Dinner, Haddock, Healthy Fish Pie, Smoked Haddock