Fiskasúpa (fish soup)

Instructions

1. Peel the potatoes and the onion, then cut them into small cubes.
2. Cook the potatoes and onion in salted water for 12 minutes at a gentle simmer.
3. Add the fish fillets cut into pieces and poach for 5 minutes without letting it boil.
4. In a small saucepan, melt the butter, add the flour and stir for 1 minute, then gradually pour in the milk while whisking.
5. Pour this light white sauce into the soup, then stir gently to combine without breaking up the fish.
6. Add the chopped dill, adjust the seasoning and serve straight away.