Split and scrape out vanilla pod. Add whole pod and vanilla extract.
Gently bring to a boil, then take off the heat and allow to cool slightly to 55° C.
Mix in gelatin until dissolved.
Mix in rum, then strain through a fine sieve.
Add to moulds and refrigerate (preferably overnight) until set.
Finish it with your favourite topping, caramel, chocolate, fresh fruit or mixed berry compote.
Notes
To turn out the panna cottas dip molds in warm water for 5 seconds. Gently turn them out. They may require a firm jolt to release them. Serve with berry sauce.