- Peel the root vegetables and cut into large pieces.
- Cook them until tender in water without salt.
- Mash them together with 1 tablespoon of butter and raw apple without the skin.
- Season to taste with salt and pepper.
- Cut the fish into rectangular pieces and dip them in a beaten egg in a bowl.
- Place them on a plate and sprinkle Panko over both sides.
- Fry them until golden in butter in the frying pan.
- Finely chop the onion and place in a bowl with the juice of 1 lemon.
- Peel the cucumber and scrape out the seeds. Cut into slices and put together with the onion, chopped basil, tomato wedges and diced apples.
- Add a pinch of salt.
Serve fish fingers with horseradish, salsa and lemon wedges.