Preheat the oven to 400°F (200°C) and prepare a baking sheet with parchment paper.

In a medium skillet, heat a drizzle of olive oil over medium heat. Add spinach and sauté for about 3-4 minutes until wilted. Remove from heat and cool slightly.

In a mixing bowl, combine spinach, ricotta, Parmesan, garlic powder, and salt and pepper until smooth.

On a floured surface, unfold the puff pastry sheets and cut each into 4-6 squares.

Place 1-2 tablespoons of filling in the center of each square, fold over, and seal edges with a fork.

Beat the egg for an egg wash and brush the tops of the pastries.

Place pastries on the baking sheet and bake for 20-25 minutes until golden brown.

Cool on the baking sheet for about 5 minutes before serving.