I'm not a vegetarian, but I have been eating less and less meat and poultry, mostly because I'm following Dr. Fuhrman's "Eat to Live" plan. Also, I'm really enjoying the lack of extra preparation that meat requires. I'll probably make more complex meals when Alex gets back, but cooking for one just isn't that much fun.
I did a search on Epicurious for "vegetarian," and it came up with this recipe. I've never really prepared or eaten tofu except incidentally, but I love lime and southwestern flavors, so I thought I'd try this.

This is the sandwich as it looked today when I made it for lunch, with leftovers from last night. Obviously, this is a whole-wheat pita, not a tortilla, but toasted up it was plenty yummy. A few other changes I made: I didn't have fresh cilantro (which would have been delish), so I used dried; I added a good pinch of cayenne pepper and extra lime; today I added chopped tomatoes to the mix, plus half a shallot. There are many potential variations on this easy, light dish, many of which are suggested in the reviews on the website. This will definitely become a standard for me, because it's so easy to throw together, and has got everything you could want: lots of flavor, protein, veggies, whole grains, and portability. I love eating food that tastes good and yet is so, virtuously healthy.
A tofu tip for the wary: draining well and crumbling up the tofu (which, I've discovered, I even like cold and plain) is vital. It doesn't make it feel like meat, but it takes away any trace of slick sliminess that tofu might otherwise have.