Have you tried this fish recipe yet?
Butter the gratin dish and spread a layer of potatoes on it. Put the matie fillets on it (whole) – cover it again with potato slices. Season everything with salt, season with pepper and add nutmeg. Later pour milk-whipped cream mixture over it. Butter flakes on top and put in the oven at 200 degrees for 40 minutes.
A hearty great casserole, which also tastes delicious with a green leaf salad.