Vietnamese on the Westbank..
Most viet places in NOLA will tell you that they don't ADD any MSG to their food, but MSG and other glutamates occur naturally in fermented fish sauce, a key ingredient of vietnamese cooking. It is also present in soy sauce, another condiment used in marinades & some dishes. So you can't really find any glutamate-free viet food anywhere.
On the other hand, you could probably eat spring rolls & skip the dipping sauce, or a bowl of pho (ask first, 'cause instant pho is loaded w/MSG). Or a bun dish, sans the dressing (it comes on the side so it's not hard to avoid).
Try Tan Dinh, on Belle Chasse Hwy/Lafayette St in Gretna. Lots of variety on the menu.....