I'd give him a sanitation lecture loud enough for anyone else in the restaurant to hear. Then I'd tell him I'm not taking the food and leave.
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Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and loudly proclaiming ...."WOW! What a ride!!!!!"
LUNCH with THEOLDMAN...On a break for now...