For the short pastry, first knead flour, sugar, 250 g butter in pieces and eggs with the dough hooks of the hand mixer and then briefly knead with your hands until smooth. Cover the shortcrust pastry and chill for about 30 minutes.
Wash, halve and stone the apricots. Skin additionally as desired. Melt 75 g butter. Stir in jam.
Line a baking tray (approx. 35 x 40 cm) with baking paper. Roll out short pastry on some flour to a rectangle (approx. 26 x 35 cm). Place the pastry sheet on the baking tray using the pastry roll. Then form a small edge of dough all around with your hands.
Prick the base of the pastry several times with a fork.
Sprinkle the dough base with approx. 2 ⁄ 3 of the flaked almonds. Spread the apricots on top and sprinkle with the butter and jam mixture. Sprinkle with the remaining flaked almonds. In a preheated oven (electric cooker: 200 °C/circulating air: 175 °C/gas: see
manufacturer) on the second rack from below for about 30 minutes. Let it cool down. Dust with icing sugar before serving.