A delightful blackberry tart for when brambles are in season. The vanilla cream layer is delicious. If you want a shortcut for this tart, use shop-bought pastry.
You can use 1/2 a vanilla bean instead of the vanilla extract.
This tart also works well with pretty much any other fresh berry.
You can make the cream in advance, store in the fridge and spread it over the cooled pastry case when ready.