Wait approx. 3 1/4 hours. Mix flour and baking powder in a bowl. Add sugar, soft butter and egg and knead to a smooth shortcrust pastry. Wrap in foil and chill for 20-30 minutes. In the meantime peel apples, remove seeds and cut into eighths. Mix with lemon juice. For the shortcrust pastry, mix fat, sugar and lemon peel until foamy.
Stir in eggs one after the other. Add lemon juice and cream and finally stir in flour and baking powder briefly. Lightly grease a fat pan of the oven (32 x 39 cm) and roll out the shortcrust pastry thinly on top. Spread apples on it and spread evenly with the shortcrust pastry. Sprinkle with flaked almonds and sugar. Bake in the preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: level 2) for about 1 hour. Let the apple pie cool down completely on the baking tray