Bring milk, 1/8 litre 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. Put the dough into a mixing bowl and immediately add 1 egg.
Then let the dough cool down for about 10 minutes. Stir in the remaining eggs one by one. Let the dough rest for 30 minutes and put it into a piping bag with a large star-shaped spout. Line 2 baking trays with baking paper and spray eighteen 8 cm long strips on top.
Bake one after the other in the preheated oven (electric oven: 225 ° C/ gas: level 4) for about 25 minutes (if necessary, place an ovenproof dish with hot water in the oven).
Stir icing sugar and lemon juice until smooth (if necessary add a few drops of water). Spread the upper eclair halves with icing sugar in the middle, sprinkle with confetti immediately and allow to dry.
Cut the plums into small pieces. Whip the cream until stiff and allow the vanillin sugar to trickle in. Fold in aniseed. Pour aniseed cream into a piping bag with a large perforated spout and squirt onto the lower eclair halves.
Spread plum pieces on top and cover with the upper half. Chill the eclairs until serving. Makes about 18 pieces.