Preheat the oven to 200 C
Chop the onions, mushrooms and peppers and add to a frying pan with some oil.
Dice the chicken and when the onions, mushrooms and peppers are soft add them to the pan.
When the chicken is cooked stir in the fajita seasoning and mix well.
Remove from the heat.
Place a sheet of Jus Rol puff pastry onto a baking sheet. Add the chicken mixture to the top.
Bake in the oven for fifteen minutes until the pastry is cooked