Bring 1/4 litre of water, fat and salt to the boil in a saucepan. Add the flour at once and stir until the dough comes off the bottom of the pot as a lump. Remove the pot from the heat. Stir in eggs bit by bit. Pour the dough into a piping bag with star-shaped spout.
Line a baking tray with baking paper. Spray 6 rings (approx. 7 cm Ø) on it. Bake in the preheated oven (electric cooker: 200 ° C / fan-assisted oven: 175 ° C / gas: level 3) for about 25 minutes. Cut open immediately with scissors. Prepare 6 more rings in the same way
Mix 4 tablespoons of milk and pudding powder. Boil up the rest of the milk. Stir in the pudding powder. Bring to the boil again briefly.
Let the pudding cool down a little. Stir in lemon zest and quark. Season cream with sweetener and fill into a piping bag with star-shaped spout and squirt onto the lower halves of the ring. Place the upper ring halves on top and decorate with powdered sweetness and ground pistachios