At a glance
You're building layers of flavor here—starting with a buttery pastry base, filling it with a tangy rhubarb and farmer's cheese custard, and topping it with grated dough for texture. The biggest time commitment is chilling and resting the dough for at least an hour, but the actual hands-on work moves pretty quickly once you get baking.
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Pastry
Mix the fine semolina flour with baking powder and icing sugar. Add the egg yolks and chilled butter cut into cubes. Work into a firm, non-sticky dough. Wrap it in plastic wrap and let it rest in the fridge for at least an hour.
For this step
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Three portions
Divide the dough into 3 equal parts. Put one part back in the fridge. Combine the other two and use them to form the base in the tin.
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Prepare the tin
Line the bottom of a 25 cm springform cake tin with baking paper, tucking it in neatly around the edges. Grease the sides with butter and dust with fine semolina flour.