Are you asking if Disney hires inexperienced food-handlers to work in their kitchens?
Let me make a distinction - taking something like precooked meat and slapping it on to a piece of bread is not cooking, it is food handling. So yes, an inexperienced person can be hired for this type of McJob. On the other hand, the person cooking that meat is likely to have some experience (possibly starting out at that McJob) and/or education - because handling raw food requires some additional knowledge and/or experience.
So if I were to venture a guess - no, Disney likely hires people with some experience to cook. But that experience may be a food-handling job at Disney.
There are cooking schools, community college courses, and even plenty of High Schools 'home ec' classes (see: Careers in the Culinary Arts nonprofit) that prepare people to get hired as cooks - anywhere. Disney likely hires people to cook with any of these experiences. But Disney is not likely to hire as a cook what would have been termed 'apprentices' before these learning opportunities became ubiquitous.