1teaspooncoarse sugaroptional for sprinkling (or granulated sugar)
Instructions
Preheat oven to 400°F. Add parchment paper (from puff pastry) to a baking tray.
Unroll puff pastry, roll out to about 14 inches. Cut dough into a circle if desired and put on the parchment lined baking tray. Refrigerate while making the blueberry mixture.
In a medium bowl, mix blueberries, sugar, cornstarch, zest if using, lemon juice, and cinnamon.
Place blueberry mixture in the center of the puff pastry, leaving a 2 inch border. Fold pastry over top of berries, turning as you go. Pastry will overlap. Dot blueberry mixture with butter.
Gently brush pastry with milk and sprinkle with 1 teaspoon sugar if using.
Bake for 45-55 minutes or until pastry is golden brown and berries are bubbling. After 30 minutes, loosely tent with foil if pastry is getting browned. Cool for 5 minutes before cutting and serving.
Serve with whipped cream or vanilla ice cream.
Notes
Keep leftovers in an airtight container in the refrigerator for 3 days and in the freezer for 2 weeks.