What's your secret ingredient that makes your version of a common dish better than anyone else's?
Mine probably isn't that secret these days, but almost every sauce I add nutritional yeast to. Curry, chilli, bolognese, it just makes them all better.
Beans (usually black beans, but I've been looking more into other varieties lately), lentils, peas, soy curls, tofu, tempeh, tvp, rice, oat groats, barley, quinoa, bulgur, amaranth, other grains I can't remember at the moment, and seitan: wherever most people would use mutilated body parts.