Knead 250 g flour, 1/2 tsp salt, eggs and 3-4 tbsp water to a smooth dough. Let rest for about 30 minutes
Clean, wash and roughly cut the spinach (defrost the frozen spinach). Peel and chop the onions
Heat 2 tablespoons of butter in a saucepan. Fry 1/3 onions in it until translucent. Add spinach and let it collapse, season. Chop nuts and mix in. Stir in breadcrumbs
pasta dough on some flour to two thin plates
(à approx. 30 x 32 cm) unroll. Spread one with egg white. Spread 16-20 portions of spinach filling evenly on a pastry sheet. Cover with the second plate. Press the spaces between the plates well and roll out the Maultaschen
Cook in boiling salt water for 10-12 minutes. In the meantime clean, wash, seed and finely dice the tomatoes. Heat 2-3 tablespoons of butter. Steam the rest of the onions and tomatoes briefly. Serve everything