Don't be embarrassed if your foodie friends have known about it for years. If it's new to you, it's new!
My recent discovery is halloumi cheese. I'd seen it for years and hadn't been interested, but them I bought it on a whim, grilled it with some lamb, and now I am hooked. The delicious, salty ,charred exterior paired with the tangy, vaguely minty interior are beyond description. Can't get enough of it.