"Little Vietnam" is just up the street from where you'll be staying at Broadway and Argyle and will have plenty of options for both you and your friend. My first pick is Tank right on the corner. There's also quite a few Ethiopian restaurants in the immediate area that have a lot of veggie options. I can only speak for Demera, that I thoroughly enjoyed but have heard there's better further North on Broadway. I'm sure there's a thread to be found about it here on Chow. And if your friend is game there's a vegetarian place at 5812 N. Broadway. Have fun!
Magnolia Cafe would be my top choice in the neighborhood. It is a very intimate neighborhood cafe with creative modern food. And it's steps from you. Marigold is very good for modern Indian food without a full scale immersion like Devon Ave. A few places on Argyle are great, like Tank or Thai Pastry. Tweet is a quirky little cafe that turns out decent comfort food. Owner Michelle Fire and the fabulous art are worth the visit. Lastly, for a trippy, loud, lunar moonscape (is that redundant?) sushi experience, Agami.
Pho Xe Tang (Tank Noodle)
4953 N Broadway, Chicago, IL 60640
Marigold Indian Restaurant
4832 North Broadway, Chicago, IL 60640
1224 W Wilson Ave, Chicago, IL 60640
Thai Pastry Restaurant
4925 N Broadway St Ste E, Chicago, IL 60640
5024 N Sheridan Rd, Chicago, IL 60640
Agami Sushi & Lounge
4712 N. Broadway, Chicago, IL 60640
Glenn's Diner, 1820 Montrose, is not a diner, just a tiny restaurant that specializes in wonderful fish and seafood. Its owner used to manage a fish market so he knows what he's doing and has good sources. Somebody already mentioned Thai Pastry (full lunch, not just pastry) in the Argyle Street area that spills over onto Broadway. Or, hop on the Clark 22 bus and go ten minutes up the road to Andersonville (Clark between Foster (5200 North) and Bryn Mawr (about 5600 North) to Reza's (Persian, superior for good veg selections) or any of twenty other fine places---a very active strip.
Thanks so much for all the help guys!!! We did hit quite a few of the places. The first mornin' we hit a Pancake House greasy spoon that actually had some pretty tasty potato pancakes. We also had pretty good meals at Tweets and Magnolia Cafe. I wish i had asked them about how spicy the sauce on the arepas at Tweets was, man I was crying! The big surprise was the dim sum at Furama... after all the negative things i had read, it was great and super reasonable. Even forced my friend to admit to loving the braised bean curd. Thanks again!!