Mix the lemon juice with water and keep it aside.
In a bowl mix the all purpose flour, sugar and salt. To this add the lemon water and knead it to a soft dough. Add about 1 1/2 tbs of butter and transfer to the counter and knead for 10 mins. Let it sit for 10 minutes.
Now take the dough, dust well and roll it to a rectangular sheet of 10×20 inch with 1/8 inch thickness. Divide the butter to 3 equal portions and keep it aside. Divide the sheet into an imaginary 3 portions. Apply a thin layer of one portion of butter to 2/3 portion (2 portions) on the rectangular sheet and sprinkle some flour.
Fold in the ungreased part first on the middle part. On this, fold the butter part. Cover it with a cloth or foil and refrigerate for 15 minutes. I froze for 5 -7 mins. After 15 minutes take out the chilled dough.
Again on a dusted counter, roll the dough to a rectangular sheet with a rolling pin and apply the second portion of butter to 2/3 of the sheet and fold it in the same way like the first time. Cover it with a cloth or foil and refrigerate for 10 minutes. Repeat the same process as above.
Now for the third rolling, dust again and roll the dough to a rectangular sheet like before and reserve a tsp of butter and apply the butter to the whole sheet and fold it one above the other to a thin sheet as shown.Then finally apply the reserved butter and sprinkle some flour and fold it .Refrigerate it for 10-15 minutes.The pastry is ready now.
While the pastry is resting make the stuffing.