For the dough 250 g flour, 1 pinch of salt, 150 g butter in pieces, 1-2 tablespoons cold water and 1 egg first with the dough hooks of the mixer, then quickly knead with your hands to a smooth dough. Wrap the dough in foil and chill for about 30 minutes.
Grease a muffin tray (12 troughs) well and sprinkle with flour. Roll out the dough on a floured work surface to a thickness of approx. 3 mm. Cut out 12 circles (approx. 10 cm Ø). Place a circle of dough in each recess of the muffin tray, pull up the edges. Prick the base several times with a fork. Bake in the preheated oven (electric oven: 200 °C/circulating air: 175 °C/gas: see manufacturer) for approx. 15 minutes on the lowest rack.
Meanwhile wash the salmon fillet, dab dry and cut into small cubes. Wash the herbs, shake dry and cut finely. Whisk sour cream and 3 eggs. Season with salt and pepper. Stir in dill and chives.
Remove the muffin tray from the oven. Spread the salmon in the pastry trays. Pour herb icing evenly over the salmon.
Continue baking at the same temperature for approx. 25 minutes on the lowest shelf. Remove from the oven and let cool on a cake rack for about 10 minutes. Carefully lift the mini quiches out of the trays and arrange them on the table. Crème fraîche tastes good with them.
Press the edges of the dough well to the inside of the bowls and push them up a little more. When baking, the dough will shrink a little.