Using a blender or food processor, blitz the digestive biscuits into a fine crumb then transfer them into a mixing bowl. Or you could use a rolling pin to crush the biscuits in a plastic bag.
In a microwave or pan over low heat, melt the butter, pour it into the bowl and stir it into the biscuit crumbs to combine well.
Transfer the biscuit base to a non-stick 20cm x 2.5cm fluted quiche tin with removable loose base, press it into the bottom and sides, and freeze for 15 minutes or so.
Clean the blender or food processor, blend the cream cheese, mascarpone and rose essence until smooth, then use a spatula to evenly spread it around the chilled biscuit base and smooth it out on top.
Arrange the berries on top as you like, slide the tart into the fridge and chill, preferably overnight or for a minimum of five or six hours to properly set
When ready to serve, remove the fluted ring and carefully slide the cheesecake onto a serving plate. Arrange the fresh mint leaves on top, slice, and serve.