Questions, Questions...

I've got questions, do you have the answers? ;)A) What ingredient formed the crust on these onion rings?B) What are the two main ingredients in this veggie burger?C) This one is off-topic. I'm going to Boston for a long weekend, so gentle readers, do you have any suggestions for must-see, must-do, must-eat things in Boston? I don't eat seafood so the chowda is out.Have a lovely weekend, everyone!