The only Safe Salad dressing is Oil & Vinegar.  (It tastes better, and is
better for you)

With most restaurant food, one can never be sure.  I only eat dishes in
which I can actually see the individual ingredients.  Avoid sauces of all
types.

Waiters ( and Waitresses) are unreliable.

A few years ago, we attended an anniversary party.  Strict instructions
were given, that I could not have any dairy.

A pasta dish with "Vodka" sauce  was placed in front of me, with assurances
that it had no dairy.  I did not like the color,  and did not start eating.
 Suddenly another waiter swooped down and removed it.  The Vodka Scauce had
cream in it.

Simon W Hecht