Mix flour and 1/2 teaspoon salt in a bowl and press a depression into it. Place the eggs and 3-4 tablespoons of cold water in the hollow and knead from the centre to a smooth dough. Wrap in cling film and leave to rest at room temperature for about 1 hour. In the meantime, clean the spinach, wash it thoroughly several times and let it drip off. Bring 1/4 litre of salted water to the boil in a pot, add the spinach, cover and steam for 3-4 minutes until it has collapsed. Drain spinach on a sieve and let it cool down. Meanwhile peel 1 onion and chop finely.
Cut the bacon into fine cubes as well. Fry the bacon in a frying pan until golden brown and fry the diced onion until transparent. Coarsely chop the spinach, add it and fry it briefly. Season with salt, pepper and nutmeg. If necessary, stir in 1-2 breadcrumbs and let cool down. Peel the remaining onions and chop roughly. Wash and quarter the tomatoes and remove the seeds. Cut tomato quarters into fine cubes. Wash parsley, dab dry and cut into fine strips, except for a little bit for garnishing. Halve the dough and roll out to two thin rectangles (approx. 30x40 cm). Spread about 12 small heaps of spinach on a pastry sheet. Brush the spaces in between with egg white and place the second pastry sheet on top. Press down well with a spoon handle and cut into square pieces with a pastry wheel.
Wash and quarter the tomatoes and remove the seeds. Cut tomato quarters into fine cubes. Wash parsley, dab dry and cut into fine strips, except for a little bit for garnishing. Halve the dough and roll out to two thin rectangles (approx. 30x40 cm). Spread about 12 small heaps of spinach on a pastry sheet. Brush the spaces in between with egg white and place the second pastry sheet on top. Press down well with a spoon handle and cut into square pieces with a pastry wheel. Cook the Maultaschen in a large pot with plenty of boiling salted water for about 8 minutes. Melt the butter in a pot and lightly brown the onions in it. Add tomatoes and season with salt and pepper. Drain the Maultaschen well and divide into 4 plates. Pour butter sauce with melted onions and tomatoes on top. Serve sprinkled with parsley and garnished
Cook the Maultaschen in a large pot with plenty of boiling salted water for about 8 minutes. Melt the butter in a pot and lightly brown the onions in it. Add tomatoes and season with salt and pepper. Drain the Maultaschen well and divide into 4 plates. Pour butter sauce with melted onions and tomatoes on top. Serve sprinkled with parsley and garnished