Mix flour, fat, sugar, orange peel and egg yolk with the dough hooks of the hand mixer. Knead to a smooth dough with your hands and cover and refrigerate for 30 minutes. Grease the moulds (11 cm Ø).
Roll out the dough between 2 layers of cling film approx. 3 mm thin and line the moulds with it. Prick several times with a fork and bake in a preheated oven (electric: 200 °C/ gas: level 3) for 12-15 minutes.
Carefully remove from the mould and allow to cool. In the meantime drain the peaches and cut them into slices. Cover the base in a circle. Warm up the apricot jam. Coat peach slices and edge of dough.
Gratinate under the grill for 3-5 minutes. In the meantime whip cream. Arrange the tartes still warm with the cream on plates. Drizzle egg liqueur over the cream and serve.