My friend and I did this last month. Truly one of the best experiences I've had. It was wonderful. The company that oversees this is call Cozumel Chefs. They email you the directions- also in Spanish to give to the cab driver. The cab drivers all seem to know Josefina and speak very highly of her. Short ride $8. Over 3 hours of planning, shopping and cooking with this incredible women.
Hope you get a chance to experience it.