15 is a great age to get your feet wet in the kitchen!!! As a chef (in Vancouver) with daughters I think that if she is meant to chef, she will, with or without you. If she's not meant to, you can help guide her to the next thing ( possibly food related...) There is no escaping the downsides, without whining on about them, as a career path it's comparable to the entertainment industry... I did not encourage my girls to be models or actresses either By all means though see if you can position her in a relatively gentle kitchen and get her doing prep, dishes and some customer service. All building blocks for cooking and a good way for her to start finding her feet. A good caterer in your area is a 15-year old girl friendly option. As an aside, neither of my girls cooked , or showed any interest in it other than being informed and interested eaters, till they were 18-19, and now both are showing off in the kitchen. Surprising and delightful !