Separate the egg white from the yolk and beat to a snow.
Mix the sugar, butter and yolk until creamy. Then stir in the semolina, grated lemon zest, vanilla pudding powder and salt.
Then pull the snow under.
In the meantime, preheat the oven.
Line a rectangular cake pan with puff pastry. Fill in the entire mass.
Another layer of puff pastry at the top. Brush this with a mixed egg.
Place in the oven and bake at 150 degrees for 1 hour.