This makes a sensation filling for sponge rolls or an Angel Food Cake. You can also marble it into a cheesecake.
8 egg yolks
1 1/2 cups sugar
1/4 cup (1/2 stick) butter
3 lemons, zest grated and juiced
Place the ingredients in the double boiler over boiling water. Don’t let top pan touch the water. Cook and stir until mixture begins to gel or thicken ever-so-slightly. Remove from heat and allow to cool. Cover and refrigerate it to thicken.
This keeps, refrigerated, for about 1 week.