Step 1- Preheat the Oven
Heat your oven to 400°F (204°C).
Step 2- Prep the Sheet Pan
Line a sheet pan with parchment paper and set aside.
Step 3- Make the Peach Filling
In a medium bowl, combine the sliced peaches, brown sugar, vanilla, cornstarch, and salt. Set aside.
Step 4- Make the Wash
In a small bowl, whisk together the plant milk and water until smooth. Set aside.
Step 5- Cut the Pastry
Unfold one sheet of puff pastry and smooth it flat. Cut it into 6 equal rectangles. Repeat with the second sheet.
Step 6- Prep for Assembly
Place the pastry rectangles on the prepared sheet pans. Use a pastry brush to coat the edges of each rectangle with the wash.
Step 7- Fold and Seal
Fold the edges of each rectangle inward and lightly press to seal, creating a raised border.
Step 8- Add the Peaches
Brush the tops of the dough with more wash, then layer peach slices in the center of each pastry.
Step 9- Bake
Bake for 20 to 23 minutes, or until the pastry puffs and turns golden brown.
Step 10- Finish and Serve
Drizzle each tart with maple syrup before serving.