Double sink regurgitation

I've had a double sink plumbed by a licensed plumber, but I have a problem with what is going on. One sink has a garbage disposer installed and when the the disposer is turn on, the other side drain spews nasty water and chewed up food into the other sink. Is there anyway to prevent this?

drain

Either he used the wrong fitting to connect the two sinks together, or you have a drain stoppage problem.

Make sure the tee that makes the connection on other side from disposal is a baffled tee, if no baffle in it this the problem your having will exist until solved.