Mary Berry's creamy lemon tart is so simple to make ... Set aside to cool. To make the lemon posset, put the cream, sugar and lemon zest into a saucepan and heat until just boiling, stirring ...

To make the posset. Put the cream and sugar in a large saucepan and gently heat, stirring until the sugar has dissolved. Bring to a simmer and bubble for 1 min. Turn off the heat and stir in the ...