01 -
Thaw the puff pastry according to the package directions until it unfolds without cracking but still feels cool and firm.
02 -
Beat the cream cheese, sugar, egg yolk, vanilla, and salt until smooth and creamy. Scrape the bowl well so the filling is even.
03 -
Preheat the oven to 400°F (200°C). Line two baking sheets with parchment. Cut the pastry sheets into 12 rectangles, score a 1/2-inch border inside each one, and prick the centers with a fork.
04 -
Spoon about 1 tablespoon of cream cheese filling into the center of each pastry and spread it inside the scored border. Chill the trays for 10 minutes.
05 -
Whisk the egg with water and brush only the pastry borders. Bake for 16-18 minutes, rotating once, until the edges are puffed and deeply golden.
06 -
Warm the heavy cream until steaming. Pour it over the chocolate and let it stand for 1 minute, then stir until smooth and glossy.
07 -
Let the danishes cool for at least 15 minutes. Spoon ganache over the cream cheese centers and dust lightly with powdered sugar if desired.