one frozen pie crust sheet- or homemade*
2 cups berries, washed and dried
1 1/2 T. white sugar
cinnamon
one egg yolk
butter
large crystal sugar, optional

Heat oven to 400 degrees. Line a baking stone with parchment paper. Place defrosted pie crust on parchment paper. Roll out a little. Place berries in the center. Sprinkle with sugar and a little cinnamon, just a little. Dot with about 1-2 T. butter. Fold edges over the berries but leaving a hole in the center. Brush with egg yolk that has been beaten with about 2 tsp. of water. Sprinkle with hail sugar or large crystal sugar if you would like or with a little regular white sugar. Bake for about 20 minutes, or until golden brown. Serve warm with ice cream. Serves 4-6. 

Source: www.bigredkitchen.com