Spinach and Cheese Puff Pastry Squares

• 2 sheets puff pastry, thawed if frozen
• 1½ cups fresh spinach, chopped, cooked, and squeezed dry (or 1 cup frozen chopped spinach, thawed and drained)
• 1 cup ricotta cheese (or crumbled feta for a tangier flavor)
• ½ cup shredded mozzarella cheese
• 2 large eggs, divided
• Salt and pepper to taste
• Optional: sesame seeds or poppy seeds for topping

Directions