I’m sorry to hear about your unfortunate lunch break! Technically speaking, there is no law against eating while driving in California, so it’s not illegal. That said, there is a law against distracted driving and it’s not uncommon that California law enforcement officers interpret eating behind the wheel as such.
California has fought hard to banish distracted driving due to the thousands of motor vehicle deaths that occur in the state year after year. Other forms of distracted driving include:
Since it’s up to the police officer’s discretion on whether or not to hand you a ticket for distracted driving—if you feel you must eat while you drive, pay close attention to the road and keep your hands on the wheel as much as possible.