01 -
Preheat the oven to 400°F (200°C). Line a large baking sheet with parchment paper.
02 -
Beat the cream cheese, 2 tablespoons granulated sugar, vanilla, lemon zest, and salt until smooth and spreadable.
03 -
In a separate bowl, toss the diced strawberries with the remaining 1 tablespoon sugar and the cornstarch.
04 -
Unfold the cold puff pastry on a lightly floured surface. Cut each sheet into 4 squares. Add about 1 tablespoon cream cheese filling and 1 tablespoon strawberries to the center of each square.
05 -
Brush the pastry edges lightly with water. Fold each square into a triangle, press out air, and crimp the edges with a fork. Cut a small vent in the top of each turnover.
06 -
Whisk the egg with 1 tablespoon water. Brush over the turnovers and sprinkle with coarse sugar if using. Bake for 17-20 minutes, until puffed and deep golden.
07 -
Cool for 10 minutes. Stir powdered sugar, milk, and vanilla into a thin glaze, then drizzle over the warm turnovers before serving.