Mix flour, yeast, sugar, salt and eggs in a large bowl. Add butter and knead until you get a homogenous dough.
Divide the dough into two pieces, spread it using a roller pin and place it in the pie pan. Cover with a damp cloth and let stand for 10-15 minutes. Make some holes on it with the help of a fork.
Grate the lemon peel and squeeze 1 lemon juice.
On the other side, add 80 gr of sugar with vanilla and boil. While this mixture is being cooked, whisk 5 eggs in another bowl and with the remaining 50 gr of sugar. Add grated lemon peels and flour into this mixture and blend to get a cream. Add hot milk and cook until it boils. Turn off the hat and add lemon juice and butter and give it a stir. Cover with a plate and cool for 15 minutes.
After the garnish has cooled down, pour over the dough we have placed on the pie pan and flatten it. Garnish with lemon slices and cook in a preheated oven for 15-20 minutes at 220 ° C.
