Defrost frozen spinach. Clean, wash and roughly chop the fresh spinach. Peel onion and cut into fine cubes. Sauté onion in 3 tbsp. hot butter. Add the spinach and cover and let it collapse. Cool down a little and drain
Finely grate the parmesan. Stir the ricotta, half of the Parmesan, eggs and egg yolks until smooth. Mix in the spinach. Season well with salt, pepper and nutmeg. Knead in the flour bit by bit.
Remove the cams from the mixture with 2 moistened tablespoons. Let them simmer in plenty of boiling salt water until they float on the surface. Drain and put them into a greased casserole dish
Melt 70 g butter and drizzle over the cams. Bake in the preheated oven (electric cooker: 175 °C/circulating air: 150 °C/gas: level 2) for approx. 5 minutes. Sprinkle with remaining Parmesan cheese. Bresaola tastes good with it
Drink: cool Italian white wine, for example Lugana DOC from Fracciaroli