Preheat the oven to 425 degrees. Line a baking sheet with parchment paper.
place a layer of puff pastry on the baking sheet. Poke holes all over the puff pastry with a fork. Brush with egg wash. sprinkle the edges of the pastry with Everything But the Bagel seasoning.
Bake 20 to 25 minutes, until it's golden brown and puffy.
Let the pastry cool slightly. Gently spread the cream cheese over the tart and layer the smoked salmon on top. Sprinkle on the pickled onions, fresh dill and capers. Slice and serve!