I know that there is a prohibition to eat meat and fish together. But, I'm not sure if this prohibition applies to these two actual items or to other items that may have touched one of these two.
For example, let's say someone served rice on someone's plate and on that plate was a piece of chicken. The rice was not mixed with the chicken, but it touched it on the plate, and may have absorbed some of the chicken taste. We are not sure if it did or not. The sushi chef tastes the rice, and it doesn't taste like there is any chicken taste. But, then, again, that's one person's opinion. We know that it was next to the chicken at some point.
Can the sushi chef (who may be Jewish) use that rice to make sushi (with fish) rolls, or would this be a prohibition of eating meat with fish?