Melt the fat and let it cool down. Knead with flour, 250g sugar, ground almonds, egg yolk, cinnamon and salt to a crumbly dough. Cover and chill for approx. 30 minutes.
Stone the cherries. Mix the low-fat quark with milk, cream, vanilla sugar, custard powder, 100g sugar, eggs and lemon peel until smooth.
Grease a springform pan (26cm in diameter). Spread 2/3 of the crumble dough in it and press down. Spread quark mixture on top. Dust the cherries with flour and spread on the quark.
Bake in a preheated oven at 175 ° C for 45 - 50 minutes. Spread the remaining crumble on the cake about 30 minutes before the end of the baking time.