Preheat oven to 350°F and line a cookie sheet with parchment paper or preheat Air Fryer to 350°F.
Combine all of the filling ingredients in a bowl and mix until fully combined.
Roll out the thawed puff pastry and cut into rectangles. Depending on the size of the sheets you should be able to cut 12 rectangles from each sheet of puff pastry, leaving you with 24 pieces (4 x 3 cuts) to make 24 bites.
Add 1-1.5 tbsp of spinach artichoke dip to each piece of pastry.
Fold the 4 corners of puff pastry towards the center to create the bites and pinch the corners together.
In a bowl, whisk the egg. Brush the tops of the bites with the egg.
COOKING METHODSOven Cooking Method - Bake the bites on the prepared baking tray for 15 - 20 minutes, or until golden brown.Air Fryer Cooking Method - Add the bites to Air Fryer basket or tray. Cook for 10 - 15 minutes, or until golden brown.
Allow the bites to cool for 5 minutes before serving and enjoy!