Boil 3 eggs hard in about 10 minutes, rinse with cold water and peel. Soak rolls in cold water. Peel and finely dice onions. Knead minced onion, one diced onion, squeezed roll and remaining egg. Season with salt, pepper and paprika. Form a loaf out of it, incorporating the boiled eggs in the middle. Place on a greased baking tray.
Bake in the preheated oven (electric cooker: 200 °C/ gas: level 3) for approx. 45 minutes, then leave to rest for approx. 10 minutes. In the meantime defrost the puff pastry. Wash and clean the mushrooms. Chop half finely. Cut the remaining mushrooms into slices. Wash the herbs and dab dry. Chop parsley finely, cut chives into fine rolls. Heat oil. Fry 2 diced onions and the chopped mushrooms until golden brown. Season with salt and pepper and let it cool down a bit. Fold in herbs. Roll out the puff pastry to a rectangle (approx. 25 x 30 cm) on a floured work surface. Spread the farce over it up to a rim of 5 cm. Brush the edges with water.
Fry 2 diced onions and the chopped mushrooms until golden brown. Season with salt and pepper and let it cool down a bit. Fold in herbs. Roll out the puff pastry to a rectangle (approx. 25 x 30 cm) on a floured work surface. Spread the farce over it up to a rim of 5 cm. Brush the edges with water. Whip the puff pastry with the farce around the loaf and press down slightly at the edges. Bake in a preheated oven (electric: 200 °C/ gas: level 3) for another 15 minutes. Meanwhile, for the sauce, fry the remaining onion and mushrooms in hot fat. Dust with flour and sauté. Add cream and stock while stirring, bring to the boil and season to taste with salt, pepper and lemon juice. Arrange roast with some sauce on a plate. Garnish with lettuce leaves, parsley and tomato slices. Add remaining sauce extra
Bake in a preheated oven (electric: 200 °C/ gas: level 3) for another 15 minutes. Meanwhile, for the sauce, fry the remaining onion and mushrooms in hot fat. Dust with flour and sauté. Add cream and stock while stirring, bring to the boil and season to taste with salt, pepper and lemon juice. Arrange roast with some sauce on a plate. Garnish with lettuce leaves, parsley and tomato slices. Add remaining sauce extra