Line pie dish with bottom crust with 1/2" overhang
In a large bowl, mix huckleberries, sugar and cornstarch together. Let sit for 10 minutes and then pour mixture into pie pan.
Place top crust over mixture and fold bottom crust over and seal the edges.
Using a sharp knife, score the crust for ventilation and air circulation
Lightly brush heavy cream over the top of crust
Bake in preheated oven for 15 minutes. Reduce heat to 350 degrees and bake for an additional 25 minutes or until crust is golden brown. Let stand for 15 minutes prior to serving.