Preheat the oven to 400F
In a cast iron skillet, heat butter. Once it gets hot, add flour and stir until fully incorporated. This will thicken the sauce later on.
Add oil to the pan and then add chicken.
Stir chicken and cook until outside is no longer pink on all sides
Add pumpkin curry and stir. Cook for five minutes and then add frozen vegetables. Stir.
Remove from heat and let it cool
Roll out sheet of puff pastry slightly, and cut into 25 3” squares. 5 rows down and 5 rows across.
Place puff pastry squares overlapping on top of the chicken mixture in the skillet.
Mix one egg with water in a bowl. Using a pastry brush, brush a thin layer on top of the puff pastry.
Put it in the oven and bake for 20-25 minutes or until brown.