Assuming we’re sticking to some kind of physical realism, either the art of cooking can fit in a virus capsid, or it’s encoded into the larger laws of physics somehow. I don’t think there’s anything in between that could possibly respond in a complex-but-controlled way.

Edit: Although come to think of it, there should probably be more layers after roach. Maybe fruit fly next; that’s an awfully big tardigrade and one of the larger protists, and as a result a normal-sized bacteria would probably fit quite comfortably on top.