What you need

* 1 cup milk
* 1 tablespoon sugar
* ½ teaspoon Stonehouse Lime Olive Oil
* 2 egg yolks
* ½ teaspoon cornstarch

What you do

Combine milk, sugar and lime rind in a small heavy-bottomed pot. Cook until bubbles appear around the edge of the pot but the mixture is not quite boiling.

Whisk together egg yolks and cornstarch in a large bowl. Pour in milk mixture, whisking constantly, to combine. Return custard to pot and cook over low heat, whisking constantly for 8 minutes, or until it has the thickness of heavy cream. Immediately pour into a clean bowl and let cool.