Preheat your oven to 400°F (200°C). Line a baking sheet with parchment paper.
In a bowl, mix spinach, ricotta, feta, mozzarella, garlic, salt, pepper, and nutmeg until well combined.
Roll out the puff pastry sheets and cut them into squares (about 3×3 inches).
Spoon a tablespoon of filling into the center of each square. Fold over into triangles (or leave as squares), pressing edges lightly with a fork to seal.
Brush the tops with beaten egg for that golden shine.
Bake for 15–20 minutes, or until puffed and golden brown.
Serving and Storage Tips
