Pre heat oven to 180°C.

Cut puff pastry into 24 squares.  Push each square into one of the holes in a mini muffin tray.  Bake in the oven for 5 minutes.

Remove from oven and use a teaspoon to push down the centres.

Place a small teaspoon of cranberry sauce into each.  Cut the brie into 24 small squares and place one on top of each tart and bake for a further 5 minutes or until cheese has melted.