Let the fish and spinach thaw. Peel the onion, cut into small cubes and fry in the butter. Add the spinach, season with salt, pepper and nutmeg and season with a little sugar. Stir in the cream.

Layer half of the gnocchi in a greased baking dish. Spread half of the spinach on top.

Cut the fish into small cubes and place on top of the spinach. Now comes spinach again and finally the second half of the gnocchi.

Coarsely grate the cheese and spread over the gnocchi.

Whisk the egg with the cream and pour over the cheese.

Bake the casserole for about 45 minutes at 180 degrees under / top heating.

* Link to potatoes: Baked herb gnocchi made from baked potatoes