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.
Other than MSG - garlic powder, lemon pepper, paprika, and gochugaru. Almost everything I cook has those 4 put in, with only the lemon pepper reduced if citrus is not part of the dish.
We usually cook asian food at home, and gochugaru is a staple in Korean dishes. Since it's basically just red pepper, it works on almost anything. It also adds a bit of flavor (other than spice) that I can't really describe, but it's mild enough that it doesn't ruin the dish you're making.