Low Carb Vegetarian Lunch Ideas

For specific health reasons, my doctor has advised me to cut back on my carbohydrates. I'm not going on any type of fad diet, I just need to limit them as much as possible. I've been a vegetarian for about 13 years, so low carb vegetarian can be quite a challenge. Breakfast and dinner isn't really an issue, but I could use some ideas for lunches to pack for work. I usually take a pb & sugar-free jelly sandwich, yogurt, fruit, granola bar, etc...so you can see where this is going to be challenging! I'd love any suggestions you guys might have for easy lunches and/or snacks to pack for work. I typically work 10-11 hour shifts, so I try to include 2 small snacks a day. Thank you!