What is it about restaurants???
Every time I go out I always have a "plan" on what I'm going to eat, and then I say o.k. one little slice of the bread (or whatever) then I turn into a hungry maniac, and keep eating and eating.........
I think restaurants put in some type of drug to make us want to eat more
It could be that the fat in the salad dressing really tasted good to your body, so it craved more. I know sometimes when I'm not getting enough fat, and then have something with healthy fat in it, I will want to eat a lot more of that food.
Forgive yourself, and move on.
Cathy