Marinate the minced chicken for 30 minutes.
Add oil in hot pan, cook the onion until soften, then add in chicken, cook until fully cooked. Add in XO sauce, mix well and set aside.
Bring the puff pastry to room temperature, cut the pastry into square or round square (whatever size you desire). Put a tablespoon filling in the middle, brush egg wash around the edges.
Fold it and press it with a fork. Brush egg wash on top of the pasty, sprinkle with some white sesame seeds. Bake in preheated oven at 180C , bake for 15 -18 minutes or golden. Enjoy!