Defrost the spinach. Fry the minced meat in hot oil until crumbly. Peel and dice onions and garlic, add to mince and fry. Drain the tomatoes. Stir in tomatoes and tomato paste. Let everything boil down thickly.
Season with salt, pepper and paprika. Sweat flour in the fat. Deglaze with stock and milk. Let simmer a little bit. Melt 75 g cheese in it. Season with salt, pepper and nutmeg. Season spinach with salt and nutmeg. Spread some minced meat in an oven dish (approx. 25 x 36 cm). Layer lasagne plates, rest of minced meat, lasagne plates and spinach. Pour half the sauce on the spinach and cover with lasagne sheets. Add the rest of the sauce.
Season with salt, pepper and nutmeg. Season spinach with salt and nutmeg. Spread some minced meat in an oven dish (approx. 25 x 36 cm). Layer lasagne plates, rest of minced meat, lasagne plates and spinach. Pour half the sauce on the spinach and cover with lasagne sheets. Add the rest of the sauce. Sprinkle with 75 g cheese. Bake in the preheated oven (electric oven: 200 °C/ gas: level 3) for 45-55 minutes