- Dice the cod and salmon.
 - Melt the butter and add the flour. Whisk together while slowly adding the fish stock. Once thick and smooth, slowly add the full-fat milk and crème fraîche, then season with salt and pepper.
 - Thinly slice the carrot, spring onion and celeriac and chop the fresh dill. We recommend using a mandolin or carrot peeler to get thin slices of the celeriac.
 - Add the vegetables, dill, salmon and cod to the soup and leave to simmer for 5-6 minutes.
 - Serve piping hot, preferably with freshly baked bread and butter.