Preheat the oven to 350 degrees. Line a baking sheet with parchment paper.
Clean the strawberries, remove the stems and slice them lengthwise. Place the sliced strawberries into a bowl and sprinkle the sugar and cornstarch on top. Gently stir the strawberries until the sugar and cornstarch evenly cover the berries.
Roll out pie crust. Layer the berries overlapping each other inside the pie crust starting one inch from the edge. Fold the edge of the dough over the strawberries. Brush the dough with the beaten egg. Sprinkle all over with 1 tsp. sugar. Bake for 35-40 minutes.
Remove from the oven and let it cool for 5-10 minutes before slicing. Serve with homemade whipped cream.