Caramelised onion, tomato and mozzarella filo tart

1. Method

2. Preheat oven to 180c or 350f
Place the two filo sheets on top of each other. Cut into half and then cut each half into half again. So you should have 8 pieces of filo pastry.
Now layer the filo sheets on top of each other, each time moving the angle slightly until you have a rough circle of filo pastry sheets. You can then fold over the corners that stick out, to give it more of a rounded shape.
Spray a frying pan with the butter flavoured non stick spray and cook the onions until a golden caramelised colour. You may need to add a little water if it starts to stick.
Add the caramelised onion to the top of the filo pastry sheets, then add the tomato slices. Top with the broken up pieces of mozzarella cheese.
Add a drizzle of balsamic vinegar and season with salt and black pepper.
Place the filo round with topping on a baking tray, spray over the top with the olive oil flavoured non stick spray and bake in the oven till the filo pastry is crisp and golden and all the cheese has melted.