Lemon Cream by Maman (by way of Grandma, I think)

Lemon Cream (NOT a slimming recipe)
I large pot of DOUBLE cream (single won't do)
1/3 of this volume of caster sugar
Zest and juice of 1 lemon
4 tablespoonful of dry sherry

Beat up the cream till it thickens. Add the sugar and beat again. Add
the zest and juice of the lemon and beat again. Add the sherry and
beat again. Taste to check if it tastes good...It will set and keep a
couple of days if you do not eat it all up at the first session.