Oven temperature 200C
Gently fry sliced red onion and bacon cubes in olive oil until golden.
Place the brie onto the centre of a piece of tin foil, top with onion, bacon and oil mixture, sprinkle with tomatoes and a little balsamic.
Wrap the tin foil into a parcel and place onto a baking tray.
Bake in a hot oven for 20 minutes until the cheese melts and the tomatoes soften.
Remove from the oven and smear onto warm slices of ciabatta to serve.