Heat the oven to 400 degrees.
On a baking sheet with parchment paper, put the puff pastry sheet down.
Add the brie cheese and sliced tomatoes.
Brush on the egg wash and sprinkle with flaky salt.
Bake in the oven until the pastry is golden brown.
Remove from the oven and drizzle on the balsamic glaze.
Top with chopped basil.
