Spinach and Cheese Hand Pies

olive oil

medium onion, (finely chopped)

garlic, (finely chopped)

ricotta cheese

shredded mozzarella cheese

cream cheese ((at room temperature))

grated Parmesan cheese

Italian herbs

pepper

frozen spinach, (thawed and squeezed (half package))

sheets of puff pastry, (thawed)

egg, (slightly beaten)

water