I briefly looked into how you make a food safe painted plate at home and the answer seems to be "easy if you have a kiln".
You might be able to find a paint your own pottery store near you. I went to one with some friends and it was a lot of fun and I got a colorful owl coin bank for like, $10 or something. Just have to make sure it's food safe, but they usually coat everything in a glass food safe glaze so it should be.
Unrelated, weed is legal where I live, so when I checked the website for the place I went, it had big banners for "summer kids clay classes!" And "pot-tery for adults!" right next to each other.
It totally makes sense but part of me is still startled by tangential consequences of legalization.