Aerate flour, make a deepening pour water, add salt and citric acid to taste. Knead the dough for 15-20 minutes. Divide into 5 parts, brush each with oil and cool.
Roll out each part of dough, put the mixture of flour and butter in the center, make the envelope, roll out again, fold three times and refrigerate for 30 minutes. Then roll out again, fold in quarters, cool. Repeat the instructions 3 times else.
Roll the dough out thinly, scatter over minced nuts, mixed with cinnamon. Make a roll, then make a tartlet. Bake.
Leave the tartlets for 12 hours, then pour with cold syrup. To make syrup, dissolve sugar with water and cook through over law heat, then add citric acid.