Preheat the oven to 375°F.
Whisk the remaining egg with 2 tablespoons of water to make the egg wash.
Remove the chilled dough and lightly flour your work surface. Roll each portion to about 1/4-inch thickness.
Cut the dough into approximately 4 1/2-inch circles.
Place about 3/4 to 1 1/2 tablespoons of cheese filling on one half of each circle. Add a few blueberries over the filling, leaving a border around the edge.
Brush the edge with egg wash, then fold the dough over the filling to create a semicircle.
Press the edges firmly together with a fork to seal. Cut two small slits in the top of each pie to allow steam to escape.
Brush the tops with egg wash and sprinkle with turbinado sugar.
Refrigerate the assembled pies for 20–25 minutes to firm the pastry.
Bake until the pies are puffed and golden brown, about 20–30 minutes. Very thick pies may require up to 40 minutes.
Let the pies cool until room temperature or slightly warm, then drizzle with blueberry glaze and serve.