Put flour and 1/2 teaspoon of 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. Chop the pistachios. Squeeze the sausage meat out of the sausage and mix with the pistachios.
Halve the pasta dough and roll out both halves thinly. Spread the sausage meat in small heaps on a pastry sheet with a teaspoon of sausage meat mixture. Brush the spaces in between with water and place the second pastry sheet on top. Press down with a stirring spoon handle and cut into pieces with a knife. Press each Maultasche with a fork along the edge again. Cook the Maultaschen in plenty of boiling salted water for about 8 minutes. Meanwhile clean and wash the leek and cut it into fine rings. Bring leek and stock to the boil and simmer for 2-3 minutes. Add cream and season to taste with salt and pepper.
Cook the Maultaschen in plenty of boiling salted water for about 8 minutes. Meanwhile clean and wash the leek and cut it into fine rings. Bring leek and stock to the boil and simmer for 2-3 minutes. Add cream and season to taste with salt and pepper. Drain Maultaschen and arrange in deep plates with the leek-cream sauce. Makes 12-14 Maultaschen