Spinach and Cheese Puff Pastry Squares are a delightful and easy-to-make savory treat featuring flaky puff pastry filled with a flavorful mixture of sautéed spinach, ricotta, mozzarella, and Parmesan cheeses. These golden-brown squares make a perfect appetizer, snack, or party finger food, combining creamy cheese and tender spinach wrapped in a crisp, buttery pastry shell.