I've always found custard pretty tricky to make the conventional way - a lot can go wrong, and it takes quite a bit of practice to get right. In this recipe, I'll show you the traditional way, and also a foolproof method using a sous vide machine.
You can use half a teaspoon of vanilla essence (or just use vanilla-infused sugar) if you don't have a vanilla pod. If you're doing it the traditional way, you might want a teaspoon of cornflour (cornstarch), And maybe use more milk than cream.