01 -
Let puff pastry sit out for about 15-20 minutes to soften. Set oven to 400°F and get a baking sheet with parchment ready.
02 -
Whisk the egg and water together well until it’s smooth.
03 -
Combine peach slices with sugar, cinnamon, salt, and cornstarch, making sure everything’s mixed evenly.
04 -
Put pastry on the baking sheet. Lay out peach slices in 3 snug rows, leaving about an inch of space at the edges. Scatter blueberries over the top. Brush the extra pastry edge with the egg wash.
05 -
Place in the oven and bake for 16 to 18 minutes, turning it halfway through, until the crust is browned and the fruit is soft.
06 -
Stir together powdered sugar, vanilla, and milk until smooth. Add a bit more milk if you need to thin it out.
07 -
Pour the glaze on top when served. It tastes best warm.