Tell me about that one ingredient, that when discovered, it opened your mind to a whole new world of flavor possibilities!
For me, the first to come to mind is Worcestershire sauce. I'm talking about way back in my youth. It was my first introduction to what we now call umami. When I noticed my mom put it in her meatloaf I began experimenting. At the time I was just blown away by how much it changed things. I even used to put it in my Top Ramen I was so obsessed lol. More recently, dukkah. Trader Joe's is correct when they say to take bread, dip it in olive oil, and then dukkah. So tasty!!
Schezuan peppercorns. I've had the same packet for years because it takes so little to add a very unique, peppery numbness to any Asian dish. Literally grind up a pinch in a mortar and pestle with some msg and put it in any Asian cuisine to elevate all the other flavors dramatically
On a related note: pixian doubanjiang. It’s a spicy bean paste and a key ingredient in several well-known Sichuan dishes: hot pot, spicy poached fish, mapo tofu, ants climbing trees, etc