I was curious so I email shoreside concierge. This is what they said;
"Palo "Be Our Chef" must be booked once onboard on embarkation day. The first sailing that we are able to book this experience for prior to sailing is
December 3rd.
Palo "Be Our Chef" is offered during your day in Tortola
at 10:00am and has a maximum allotment of eight (8) Guests. During this experience you will learn from one of Palo's Chefs how to create four of Palo's dishes and receive some keepsake gifts as well.
If you are interested in this experience, please let your onboard team know on embarkation day so they may assist with booking this for you. The cost is $279.00 per a person and it cannot be canceled once booked."