If you are used to regular blueberries, you are in for a surprise with these wild ones. Wild blueberries are much smaller with a distinctive taste that goes so well in a pie. This pie is all about the ingredients, a delicious homemade sweet short crust, and more wild blueberries than you can count. It might look a bit bare, but trust me, you don't need to add anything else. This pie is a specialty from the mountainous Vosges region of France and definitely worth the climb.
Cream together the soft butter and the sugar.
Add the flour, the egg yolks, the water and carefully combine with your hands until the dough is sandy and form a ball.
Preheat the oven at 180°C (or 160°C).
Spread the dough thinly in a buttered pie tin. Poke several small holes with a fork on the bottom. Cover with parchment paper and baking beans.
Bake for 15 minutes. Remove the beans and the parchement paper and bake for an additional 7 minutes.
Add the wild blueberries and bake for 20 minutes. Sprinkle the remaining sugar, quickly stir with a spoon and bake for 10 more minutes or until the crust is golden.
Chill at room temperature. Then put in the fridge for a few hours (overnight is ideal) so the filling can set.