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.
Citric acid. It's like adding lemon juice, except without any added moisture, so it works where too much moisture could pose a problem, like when you are making a pizza, nachos, or frying something in oil. It also never goes bad and is incredibly cheap, I use it all the time and am not even halfway through the $15 bag I bought like 8 years ago.
You can also add citric (and malic and tartaric) acid in the right proportions to turn a sweet juice like orange or pineapple into the equivalent of lime or lemon, and then use that juice like you'd use lime or lemon in cocktails or other recipes