That is most definitely not racist though. Once we go there, we're basically trying to force ourselves to take a worldview that does not accurately represent reality.

If my classifier predicts that an Asian guy would probably eat rice, if it's accurate, is it racist?

The issue I'd have here isn't racism, it's when race dominates other features resulting in, in this case, poor recommendation quality/variety for Asians who prefer non-rice dishes or vice versa.