1 egg
1 tbsp. water
1/2 cup shredded Muenster cheese or mozzarella cheese
1/4 cup grated Parmesan cheese
1 green onion, chopped (about 2 tablespoons)
1/8 tsp. garlic powder
2 tbsp. all-purpose flour
1/2 pkg. of a 17.3-ounce package Pepperidge Farm® Puff Pastry Sheets (1 sheet), thawed
1 pkg. (about 10 ounces) frozen chopped spinach, thawed and well drained