If you get it from a baked good or from anything where the seeds have been roasted, the seed won’t germinate (the heat of cooking is too much). You’d have to get a raw sesame seed for it to germinate, but for the life of me, I have no idea what kind of plant sesame is. I could look it up, but I have to get back to cleaning the kitchen. :P
Be careful, because if you say “Open sesame” when you plant it and are holding your mouth just right, you’ll drop into a vortex from which there is no return.
As a child, I used to think that “Those thingys on hamburgers” came from those extremely similar looking thingies on strawberries. Therefore, I think you’ll get strawberries.