Roast chopped almonds in a dry pan, remove and let them cool down. Melt the butter and let it cool down a little. Mix semolina, baking powder and vanilla sugar. Mix yoghurt and sugar, stir in butter, semolina and roasted almonds and let it swell for about 15 minutes.
In the meantime grease a flat casserole dish (approx. 28x16 cm). Whisk the semolina mixture with the whisks of the hand mixer for 2-3 minutes, pour into the mould and smooth down. Bake in the preheated oven (electric cooker: 200 °C / gas: level 3) for approx. 30 minutes.
In the meantime warm up the syrup and lemon juice and let it cool down. Drizzle hot cake with it, cut it into approx. 4 cm rhombs and press an almond in the middle of each rhombus. Sprinkle with chopped pistachios as desired.
Let the cake cool down and let it stand overnight. If necessary, cut the lozenges again, carefully lift them out of the tin and arrange them on a plate. Makes about 20 pieces.