There is more than a good sandwich shop in Bella Vista. The area has the Italian Market, which has all types of shops, including some good sandwich choices.
The majority of people will tell you to go to Paesano's. The menu list isn't tremendously long but you could close your eyes and point, and will still come up with a winning sandwich. They have vegetarian options too. Disclaimer: These creations are pretty messy, so be sure to grab some napkins. It's totally worth it though.
George's and Sarcone's Deli are a couple other shops that have good sandwiches. The menus are a littler more extensive and their prices are cheap. Not sure if they offer vegetarian options or not.
Take a walk through the neighborhood. There are places all over. It'll give you a reason to take in some good food.
