In California, leaving without reporting off, is abandonment. Have your employer put the policy in writing, if a policy does not already exist. Then file a lawsuit (see Industrial Welfare Commission Wage Orders) for unfair labor practices and you will be paid for all missed meals. It makes no difference if you took a break or not. Once you clock out, the time is yours to do whatever you please, if you are not allowed to leave, you must be paid. Also, being 'on-call' by pager, phone, etc. during lunch is paid time.