Mix the fat and icing sugar with the dough hooks. Add lemon zest, salt and egg yolk. Stir in flour and baking powder. Work into a smooth dough with your hands. Cover and chill for about 30 minutes.
In the meantime wash, clean and halve the strawberries. Roll out the dough between the foil to a circle (approx. 26 cm Ø). Pour into a greased tart tin (24 cm Ø) with a removable base. Press the rim firmly and prick the base several times with a fork. Pre-bake in a preheated oven (electric: 200 °C/ gas: level 3) for approx. 10 minutes. Cover with strawberries and bake for another 20 minutes. In the meantime heat up the jam and sprinkle the strawberries with it. Bake for another 10 minutes and let cool down. Serve dusted with icing sugar.
Pre-bake in a preheated oven (electric: 200 °C/ gas: level 3) for approx. 10 minutes. Cover with strawberries and bake for another 20 minutes. In the meantime heat up the jam and sprinkle the strawberries with it. Bake for another 10 minutes and let cool down. Serve dusted with icing sugar. Makes about 12 pieces