Roasted Cauliflower (with some spices: google for recipes) with black beans also makes great vegetarian or vegan tacos. We were pleasantly surprised.
Edited to add: last night, a sort of peanut-noodle mashup, with various veg (snow peas, a tired-looking red pepper, a poblano pepper, some cabbage to increase the veg content) and some fried tofu. It was a one-pan dinner, even if not everything cooked at the same time (the tofu needed to be fried first, separately).
Tonight: probably leftovers of the mostly-quesidilla sort. I go shopping on the weekend, so it's a little hodgepodge this evening.