Resetting the chef works for the customer also.
I do not own any restaurants. However, my sims like to go out to socialize. I have experienced both restaurants where no food is received for what seems forever, and others where everything runs normally. My restaurants are a combination of Maxis built and Gallery downloads. One of the restaurants where everything ran smoothly is notoriously bad on a regular basis, yet this time it was great.
I hope this gets resolved quickly for those of you trying to own/run restaurants. Maybe then they will get around to fixing gardening.
