This Black and Blueberry Galette is a compromise. My intention was to make a blueberry galette, but our grocery also had blackberries on sale, so I thought why not catch two berries with one galette and make a Black and Blueberry Galette.
Heat oven to 425 degrees. Line a baking sheet with parchment paper, large enough to accommodate a 9-inch galette.
Wash blackberries and blueberries and dry them, using paper towels.
In a bowl, mix the berries, sugar and cornstarch.
Unroll the pie crust.
Warm the blackberry jelly until it is liquid and spread it evenly over pie crust, leaving a 1.5-2 inch border. Top with the berries and corn starch mixture.
Fold the crust around the berries. Brush edges of the crust with beaten egg and sprinkle with turbinado sugar.
Bake the galette 20-25 minutes or until golden brown and allow to cool before serving.