Cream Cheese Spinach Puffs

Preheat the oven: Preheat your oven to 400°F (200°C). Line a baking sheet with parchment paper.
Prepare the filling: In a medium bowl, mix together the chopped spinach, reduced-fat cream cheese, Parmesan cheese, minced garlic, black pepper, salt, and onion powder until well combined.
Prepare the puff pastry: On a lightly floured surface, roll out the puff pastry sheet to smooth out any creases. Cut the sheet into 12 equal squares.
Fill the puffs: Place a spoonful of the spinach and cheese mixture in the center of each pastry square.
Seal the puffs: Fold each square over to form a triangle, pressing the edges to seal. Use a fork to crimp the edges for a decorative touch.
Brush with egg wash: Place the puffs on the prepared baking sheet. Brush the tops with the beaten egg for a golden finish.
Bake: Bake in the preheated oven for 12-15 minutes, or until the puffs are golden brown and puffed up.
Serve: Remove from the oven and let cool slightly before serving.