Onions peel and chop finely. Peel and finely chop 2 cloves of garlic. Heat 2 tablespoons of oil in a saucepan, fry about half of the onions and garlic in it. Add 2 tbsp. tomato paste, sauté and deglaze with tomatoes. Season with salt, pepper, sugar and paprika
Bring to the boil and simmer for about 5 minutes. Wash and drain the tomatoes. Add tomatoes to the sauce, bring to the boil briefly, season with salt, pepper, paprika and sugar
Peel and chop 2 garlic cloves. Heat 2 tablespoons of oil in a frying pan, crumble the minced meat into it and fry it vigorously while turning. Add remaining onions and garlic, fry briefly, season with salt, pepper and paprika. Stir in 2 tbsp. tomato paste, sauté briefly. Deglaze with stock, simmer for 2-3 minutes
Crumble the feta, mix with 150 g crème fraiche. Spread some tomato sauce evenly in an ovenproof dish (approx. 26.5 x 19 x 6.5 cm). Place 3 lasagne plates next to each other on top. Layer the minced meat, sauce and feta. Layer the remaining ingredients in the same way, finish with tomato sauce
Drain mozzarella well and cut into slices. Cover lasagne evenly with it. Bake in the preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: see manufacturer) for approx. 55 minutes
For the sauce, wash baby spinach and drain well. Put 6-8 spinach leaves aside for garnishing. Peel and chop 1 garlic clove. Place the spinach, garlic and 2 tbsp. olive oil in a tall mixing bowl and puree finely. Stir in 150 g crème fraîche, season with salt and pepper. Remove the lasagne from the oven and serve with a dash of spinach sauce. Garnish with spinach leaf