Thaw the pollack fillet, rinse and pat dry. Season the fillet with garlic salt and pepper.
Make dumplings from the dumpling according to the instructions on the packet, cook, let cool down briefly and cut into slices.
For the sauce, peel the shallot and cut it into small cubes. Put all other ingredients (except cornstarch) in a small saucepan. Bring to the boil and thicken with cornstarch. Keep the wine sauce warm.
Build a breading line from flour, whisked egg and panko.
Turn the fish fillet in flour, then in a beaten egg and finally in panko. Heat up a pan with the butter. Put the fillet in, turn the dumpling slices in the whisked egg and add. Fry both sides until golden brown. Arrange with the wine sauce and serve.