Peel potatoes, slice them into chips, wash them and then soak in cold salted water for half an hour or more.
Preheat oven to 220c/200c Fan/Gas Mark 7.
Crack egg into a bowl and beat well. Place to one side.
In a flat dish add Breadcrumbs, Parsley, Mustard Powder, Chilli Powder, Paprika, Garlic, Onion Granules and salt. Mix well.
Slice fish into 4 sections (allowing 2 sections per person).
Spritz 2 baking trays with Frylight.
Drain potatoes, pat them fry with a clean tea towel, place onto one of the baking trays. Spray with Frylight and place into the oven for 25 - 30 minutes. Turning and seasoning with salt half way through.
Dip the first pice of fish into the egg and then roll in breadcrumb mixture. Place onto the baking tray. Repeat for each piece and then spray each piece with Frylight.
Pop into the oven for 18 - 20 minutes turning half way through.