01 -
Combine flour and salt in a large mixing bowl.
02 -
Add cubed cold butter and chop into the flour until fine crumbs form.
03 -
Dissolve baking soda in sour cream.
04 -
Add sour cream mixture to the flour and butter. Knead briefly until just combined into a rough dough.
05 -
Divide dough into one larger and one slightly smaller portion. Place in an airtight container and refrigerate for 30 minutes.
06 -
Cut unpeeled lemon into pieces, remove seeds, and puree in a blender until smooth.
07 -
Measure the sugar for the filling and set aside. Do not mix with the lemon yet.
08 -
Preheat oven to 180°C. Line a 26 cm springform tin with baking paper.
09 -
On a floured work surface, roll out the larger dough portion into a circle slightly wider than the tin. Place in the tin and form a small edge.
10 -
Sprinkle cornstarch evenly over the dough base.
11 -
Roll out the smaller dough portion into a circle the same size as the tin.
12 -
Just before assembly, combine sugar with pureed lemon and mix briefly.
13 -
Spread lemon mixture over the cornstarch-coated base. Carefully place the second dough circle on top and seal the edges.
14 -
Prick the top of the pie in several places with a fork.
15 -
Bake in the preheated oven for approximately 30 minutes. Cool completely before slicing and serving.