Where should I put these courses on my UC application?

I took one semester of culinary nutrition and catering and I was wondering what these classes should be listed under Subject Area/Course Category?

And no, I don’t go to a California highschool.

Where did you take these classes from? You will have to first find out which category like a-g they fall under. You can check with your institution’s name here
University of California A-G Course List.

If you can not find the info, one option is to enter under academic enrichment or reach out to one of the campuses to check if someone from thr admissions can help.

Based on the a-g course list for California HS’s, it should go under G Category.