1: Put 2 sheets gelatin into a bowl of cold water.
2: Meanwhile, pour 500 ml liquid cream, 100 ml whole milk and 70 g caster sugar into a pan. Add 2 vanillas pod, mix well and bring to the boil over medium heat. As soon as it boils, remove from heat, cover and leave to infuse for at least 30 minutes.
3: After this time, pour cream through a strainer to remove all small bits of vanilla pods.
4: Add gelatin to cream (after draining and drying with a cloth) and stir with a whisk or a maryse.
5: Put cream bowl into cold water, stirring from time to time.
6: When cream is cold, divide it between glasses, cover with plastic film and refridgerate overnight.
7: Next day, your panna cotta is set and ready to serve. You can eat it like this, but it's much better with something slightly acicidic like a fruit coulis (fruit purée).