In a pot heat the milk,half and half.Scrape the seeds from the Vanilla Bean and add the seeds and the pod into the milk mixture.
Add sugar and simmer on low heat just until the sugar is dissolved.Do not boil.
In a small bowl add about 1/4 cup of the hot milk mixture and mix the gelatine until dissolved completely.
Add the gelatine into the milk mixture and stir to mix.
Remove from heat.
Beat the Greek Yoghurt until smooth and add into the milk mixture whisking continuously.
Strain the liquid through a strainer.
Grease 4 ramekins and evenly divide the mixture amongst them.Put it in the referigerator to set for about 3 hours.