Mary Berry's creamy lemon tart is so simple to make. The filling is not baked, just set in the fridge. It can be made up to a day ahead. This is quite a deep tart so make sure you use a deep tin ...

For this recipe you will need a 23cm/9in springform ... Drain the oranges reserving the sugar syrup. Mix 100ml/3½fl oz of the reserved sugar syrup with the Grand Marnier and set aside.