Heat oil, add mushrooms, cook for 6 minutes. Transfer to a place and set aside.

Heat oil, add onion, cook for 5 minutes or until soft. Transfer to the plate with mushroom and set aside.

Heat oil, add chicken, cook for 5 minutes of until browned. Return mushroom and onion to the pan with mustard. Stir until combined.

Sprinkle flouur over chicken mixture and stir until well combined.

Slowly add milk, stiring constantly. Return to heat and stir until mixture comes to the boil. Simmer for 1 minutes.

Remove from pan and cool completely.

Preheat the oven to 200 C

Place a sheet of filo pastry on a flat surface. Spray with olive oil. fold pastry short end to short end. Spread 1/3 c chicken mixture on the edge of pastry. Roll pastry once. fold in sides and continue to roll until a sausage roll shape in formed. Place on prepared baking tray.

Brush the rolls with egg wash and sprinkle with sesame seeds.

Bake for 15 - 20 minutes.

Enjoy