Isabella's has veggie options, but not so much vegan. However, The Orchard across the street from Isabella's is amazing!! They have some meat on the menu, but they feature a lot of yummy veggie and vegan food.
I live in Baltimore City, which has a lot of veggie and some vegan options. The Avenue in Hampden is also a really great place to find vegan food. I also go down to Annapolis a lot on the weekends. I just found this Lebanese place called Lebanese Taverna. It has meat on the menu, but also has some veg friendly dishes too