Gently fry the mushrooms and Quorn Burgers in the olive oil a few minutes each side until the burgers are starting to brown and the mushrooms are juicy and tender. Season the mushrooms with black pepper
Lay your first sheet of filo pastry on a baking tray, brush with melted butter, top with another sheet and keep going, brushing each sheet with butter until you have 4 layers
Place a burger in the centre of the pastry, top with the mushroom, then the mozzarella and a drizzle of sweet chilli sauce.
Gather the edges of the pastry together firmly in a parcel
Do the same for the next parcel, then brush both with the remaining butter