Rolled Meringue with Egg Yolk Filling

Filling

• 8 egg yolks
• 1¼ cups (300 ml) condensed milk

1. To make the Filling, mix the egg yolks and condensed milk in a double boiler. Simmer, stirring constantly until the mixture starts to thicken, about 20 minutes. Add the butter and sugar and continue stirring for 5 more minutes.
2. Fold the lime or lemon zest into the mixture. Continue stirring over simmering water until the mixture turns light orange and thickens,