Separate 1 egg. Put flour, 50 g sugar, vanilla sugar, 1 pinch of salt, egg yolk and 125 g butter in flakes into a mixing bowl and knead with the dough hooks of the hand mixer to a smooth dough. Cover the dough and chill for approx. 30 minutes
Wash lime hot, grate dry, finely grate peel with a grater. Halve the fruit and squeeze the juice. Cream 75 g butter and 130 g sugar with the whisk of the hand mixer. Gradually stir in 3 eggs, remaining egg white and cream cheese. Stir in lime zest, juice and starch
Put the dough into a greased and flour-sprinkled square springform pan (24 x 24 cm) and press it down to a smooth base. Prick several times with a fork. Spread 200 ml jam on the dough. Spoon the cheese mixture onto the jam and smooth it down
Bake in a preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: see manufacturer) for approx. 1 hour. Take out of the oven and let cool down on a cake rack for about 10 minutes. Remove from the springform pan and let cool for about 1 hour
Select the fruit, wash, drain well and mix with the rest of the jam. Cut the cake into pieces and spread the fruit on the pieces
waiting time approx. 1 1/2 hours