For the basic white sauce, clean, wash and coarsely chop the shallots and vegetables. Wash and chop the thyme. Melt 50 g butter in a saucepan. Sweat shallots, vegetables and thyme in it while stirring. Dust with flour and briefly sauté lightly. Deglaze with chicken stock and reduce by half for about 30 minutes
In the meantime, cut the mozzarella into small cubes for the crust. Wash the basil, shake dry and chop finely. Cut toast into small cubes and toast in 1 tbsp. hot oil. Cream 125 g butter with the whisks of the mixer. Add the eggs and continue beating. Stir in mozzarella, basil and toast. Season with salt and pepper
Preheat oven (electric cooker: 175 °C/circulating air: 150 °C/gas: see manufacturer). Rinse fish and pat dry. Season with salt and pepper. Place in an ovenproof dish and spread the mozzarella mixture on top. Bake in a hot oven for 12-15 minutes
Add cream and milk to the sauce stock and bring to the boil. Season to taste with salt, pepper and lemon juice. Puree with a hand blender, then pass through a fine sieve. Season again with salt, pepper and lemon juice
Parmesan cheese in shavings. Clean and wash the spinach. Spinach and ravioli in
add the white sauce and simmer for 2-3 minutes. Season to taste with salt and pepper. Arrange the cod on the ravioli. Sprinkle with parmesan