Lunch in Lawrenceville? Make it La Gourmandine. Love the pastries and the sandwiches. My favorite was the prosciutto with the baby pickles, but honestly I don't think you can go wrong with any of them. Their baguettes are crispy on the outside but soft on the inside and make wonderful sandwiches.
I've been trying to not indulge my sweet tooth too much recently, so I've skipped the fantastic looking pastries most times. I did give in a couple times though. Once was a double chocolate mousse, and the other was a fruit tart Both were good, but the chocolate mousse was amazing.