We start with the preparation of the dough. Mix the butter with the 7 tablespoons of flour until smooth and leave them aside. In a cup put soda, oil, vinegar and a little salt. Put the 14 tablespoons flour in a bowl, make a hole and pour the soda . Knead an elastic dough that we spread in the shape of a rectangle.
Divide the mixture of butter and flour into three equal parts. Grease the dough with a part of butter, then fold the dough bringing in turn the middle edges of the rectangle, one on top of the other.
Put the dough in the fridge for 30 minutes, then repeat the operation 2 more times, including keeping it in the fridge.
Put the grated pumpkin in a saucepan with the sugar, juice and orange peel. Cover with a lid and simmer. Stir from time to time until the pumpkin softens well and the juice drops completely. Put the dish down, put the cinnamon and let it cool.
Divide the dough into 2 equal parts.
We spread a sheet with the rolling pin and place it in a tray, we prick it with a fork from place to place, we put the pumpkin filling, then we spread the second sheet. We prick it with a fork, we grease it with melted butter, we sprinkle the sugar and put it in the oven until lightly browned. Let the pie cool, then sprinkle with powdered sugar and portion.