Bring 1/8 litre water, fat and salt to the boil. Add the flour at once and stir until the mixture comes off the bottom of the pot as a lump. Remove from the heat and add the eggs one by one. Pour the mixture into a piping bag with a large star-shaped spout and squirt 6 strips (approx. 8 cm long) onto a baking tray lined with baking paper
Bake in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for about 30 minutes. Cut open the eclairs immediately with scissors and cool them down on a cake rack
Soak the gelatine. Drain the plums and collect the juice. Puree the plums in 3 tablespoons of juice. Add flavour. Squeeze the gelatine, dissolve and stir into the plums. Put it in a cold place
Whip the cream until stiff. As soon as the fruit puree begins to gel, fold in the quark and cream. Pour into a piping bag with a large perforated spout and squirt onto the eclair bases. Place the upper halves on top. Cool for approx. 1 hour
Melt the chocolate, fill into the freezer bag, cut off a small corner. Decorate the eclairs with chocolate strips, let them dry. Dust with diabetic sweetness