What is your go-to ingredient that will make everything taste good?

I'll go first : Chipotle chilli paste.

I just made an amazing soup out of things I had in my kitchen : sweet potato and red lentil and I added Chipotle chilli paste and it made it so good !

So I wondered what other spice, sauce, condiment people add that they think makes everything tasty?

Like if you're making a dish and it's kinda meh, what do you put on it/with it to save it?