Clean the pumpkin and bake it sprinkled with the sugar. Once it's ready, mash it and let it cool.
Crumble the biscuits to a powder, add the butter and part of the pumpkin juice released during baking. Knead a dough.
Form the pie - cover the bottom and sides of a suitable bowl with foil. Put the dough in it and spread it out, while raising up the edges.
Spread it out evenly over the pie. Leave it in the fridge until it hardens. Take the ready pie out, remove carefully from the foil and sprinkle with coconut flakes.