Dice the sweet potato and boil in a saucepan with water and salt.
2
Cut the cauliflower into bouquets and place them on a baking tray. Sprinkle with salt and pepper and bake in the middle of the oven at 200 degrees celsius for about 15-20 minutes.
3
Sprinkle salt and pepper on the cod fillet and set aside. Slice red onion and fry in a pan with a knob of butter. Fry the cod fillet together with the onion. The fish should cook for 3-4 minutes on each side.
4
Pour out the water from the sweet potato. Add a knob of butter and the desired amount of salt and pepper. Mash with a fork or potato masher until smooth.
5
Serve the cod fillet over sweet potato puree and top with roast cauliflower and red onion.