Step 1

Whisk together the egg and water, set aside.

Step 2

Mix together the cheeses, onion, and seasonings. Set aside.

Step 3

Roll out the puff pastry on a lightly floured surface to flatten the seams. Brush the surface with your egg wash.

Step 4

Top the surface with the cheese mixture, then break apart the spinach and spread evenly over the surface. ***Leave about an inch free of toppings on one of the short sides.***

Step 5

Starting on the short side that's covered with filling, roll up the pastry like a jellyroll.

Step 6

Line two baking sheets with parchment. Slice the roll into ½-3/4 inch slices and place them on the prepared sheets.

Step 7

Pop into the refrigerator or freezer to let them cool as the oven preheats to 400 degrees.

Step 8

Bake for 15 minutes or until they're golden.