Clean and wash the spinach. Peel and chop the onion. Salmon fillets wash, dab dry. Sprinkle with lemon
Toast bread and crumble finely. Dice smoked salmon finely. Melt 2 tablespoons of butter. Mix well with the toast and smoked salmon
Season salmon fillets with salt and pepper. Spread the smoked salmon mixture over them. Place the salmon side by side in a greased ovenproof dish. Bake in the preheated oven (electric cooker: 225 °C/circulating air: 200 °C/gas: level 4) for 12-15 minutes
Stir egg yolk, mustard and honey until smooth. Whip the oil drop by drop. Stir in yoghurt. Season sauce with salt, cayenne pepper and vinegar. Wash, chop and stir in the dill.
Fry the onion in 1 tbsp. hot butter. Add the spinach and let it collapse. Season to taste with salt, pepper and nutmeg. Serve everything. Served with: Boiled potatoes