Spinach-Cheese Swirls

egg

water

shredded Muenster cheese or mozzarella cheese

grated Parmesan cheese

green onion, chopped (about 2 tablespoons)

garlic powder

all-purpose flour

package of a 17.3-ounce package Puff Pastry Sheets(1 sheet), thawed

package (about 10 ounces) frozen chopped spinach, thawed and well drained