Bring the milk to a boil over medium heat, letting it sit for a couple of seconds. Then using a fork, remove the creme that forms on top and save it in a container. Repeat this process until no more cream or nata forms.

In a small pot prepare a syrup with the sugar and one cup of the remaining milk left over in the pot.

Whisk the yolks using an electric mixer until pale and add them to the syrup, stirring until well incorporated. Add the raisins, rum and the cream(natas). Mix very carefully and let it simmer for about 10 minutes, without stirring.

Transfer to individual serving dishes and let it cool in the refrigerator.