Combine: egg yolk, salt, sugar, and vanilla. Mix well.

Now add cornstarch. Mix together, no lumps.

Add milk and stir it in with mixture, make sure its combined completely.

Now cook it in a sauce pan on medium.

Stir at a steady pace. Don't stop stiring, if you do it could come out lumpy, no good.

It should thicken and turn into a cream, the longer it cooks the thicker it should get.

Put it in a bowl and add cinnamon on top let cool. But not too long, put in on a plate to cool faster.