Peel and wash the potatoes. Cook in salted water for about 20 minutes. Drain and press through the potato press. Knead with 1 egg yolk, 2 tbsp. flour and starch, season
For the filling, peel and chop the shallots. Clean and wash the leek and mushrooms. Finely dice 1 stick of leek and half the mushrooms. Sauté shallots in hot oil. Steam leek and mushroom cubes for 3-5 minutes, season. Take out
Cut the rest of the leek and mushrooms into fine slices. Steam in the frying fat for about 3 minutes. Sauté 2 tsp. flour in it. Stir in 350 ml water and bring to the boil. Stir in broth and crème fraîche, season to taste
Grate cheese. Wash the chives and cut into small rolls. Mix both with 3 tablespoons of sauce into the filling
Roll out the dough rectangularly (approx. 30 x 32 cm) on some flour. Mark about 12 rectangles (approx. 5 x 8 cm) on one half of the dough. Spread 1 tsp. of filling on each. Coat the edges with the remaining egg yolk. Fold over the 2nd half of the dough
Press the edges well. Roll out the ravioli with the pastry wheel
Cook the ravioli in slightly boiling salted water for 8-10 minutes. Drain. Heat butter. Fry the ravioli in it in portions on each side. Heat the sauce and serve with the ravioli