Thaw the fish fillets and cut into bite-sized pieces. Clean, peel and rinse the carrots and cut into small thin sticks. Peel and finely dice the onion. Clean, rinse and dice the fennel.
Season the soup with a little salt and a few turns of black pepper from the mill and sprinkle with a little chopped parsley. Fresh baguette goes well with it.
Tip: some fresh tortellini z. For example, add the ricotta and spinach filling to the soup and let it simmer.