Preheat your oven to 375°F (190°C) and position the oven racks in upper and lower thirds.

Line two large baking sheets with parchment paper or foil to prevent sticking.

In a mixing bowl, combine imitation crab meat, cream cheese, mozzarella cheese, garlic, green onions, soy sauce, and sugar until well combined and creamy.

On a lightly floured surface, roll out the puff pastry sheets and spread the filling evenly over the pastry, leaving about an inch of border.

Starting from one edge, roll the pastry tightly into a log shape, sealing the edges well.

Chill the rolled log in the refrigerator for 15-30 minutes for easier slicing.

Slice the chilled log into ½ inch thick slices and arrange them on the prepared baking sheets.

Whisk an egg and brush the tops of each pinwheel generously with the egg wash.

Bake for 15-20 minutes, rotating halfway through, until they are puffed and golden brown.