Preheat your oven as per the instructions on the puff pastry package.

Combine in a large bowl the thawed spinach, artichokes, Parmesan, Gruyère, white cheddar, garlic, cream cheese, lemon zest (if using), crushed red pepper flakes, and kosher salt.

Roll out the puff pastry on a lightly floured surface to about 1/8 inch thickness.

Cut the puff pastry into rectangles and place a spoonful of the filling on one side.

Roll up each pastry tightly, sealing the edges by pinching them together.

Brush the tops with the egg wash for a golden finish.

Sprinkle with everything bagel seasoning or sesame seeds if desired.

Bake according to the pastry package instructions until golden brown.