Toss berries with corn starch and lemon juice.
Roll pie crust into heat resistant pan.
Place fruit in the center and fold up the edges to form the crust.
Brush edges with heavy whipping cream and sprinkle with granulated sugar.
Place rectangular foil pie pan upside down on the grill & place the pie on top.
Close lid and grill for 20-30 minutes at medium heat.
Carefully remove pie from grill & cool.