1.   Fold into chilled whipped cream.

2.   Immediately pour the hot custard through the sieve into the chilled cream.

3.   It should come back together when you add a small amount of chilled cream and whisk well.

4.   Stir half the chilled whipped cream into the chilled lemon curd until mixture loosens up.

5.   The much-overlooked essential is real whipped cream that starts with a half pint of chilled whipping cream and a bit of powdered sugar.