Over medium low heat in a saucepan add lemon juice, zest and honey

Stir and heat until the honey is fully dissolved and incorporated into the lemon juice

In a separate bowl whisk your two eggs together well

Slowly drizzle the lemon honey mixture from the saucepan into the bowl while whisking all together

Whisk for about a minute

Then using a fine mesh strainer, strain the mixture back into the saucepan

Continue to constantly whisk and heat until it starts to thicken, about 5-7 minutes

As soon as it starts to simmer / bubble you know you've done it long enough

Add your vanilla, give it a quick stir and take it off the heat

Pour into a glass jar, cover, put into the fridge and you're done

Wait for it to cool and it should be all set in just a couple of hours.