actually printing your dishes is NOT food-safe, but here's 6 paragraphs why

The bacteria in layer line issue has been called into question, but additives in the filament and the printer can have an impact. I'll just copy paste the info the bot on /r/3Dprinting provides: While PolyLactic Acid (PLA) and PolyEthylene Terephthalate Glycol-modified (PETG) has been classified as Generally Regarded As Safe (GRAS). There's a lot of uncertainty around the process of additive manufacturing, so no stance can decisively say do or don't. Some testing shows that the layer lines are big enough that bacteria don't hide inside as much as expected. Additionally, it's not nearly as porous as initally expected. Some soap and water with scrubbing is enough to clean most of it out and a quick wash with a bleach solution can bring it up to almost medical standards. This does not take into account material impurities. New nozzles can come with a coating (often PTFE) to prevent blobs from sticking. The abrasives in the filament can wear this coating down and while it is safe for food to contact like on a frying pan, the worn down products are not. It also wears the nozzle and metal particles can end up in the print, all of which can have a large impact on the overall food-safety of your printed product, no matter the material used. https://www.researchgate.net/publication/370838510_Study_on_the_Sanitization_Efficacy_for_Safe_Use_of_3D-Printed_Parts_for_Food_and_Medical_Applications