Right now this is one of my favorite dishes!
Start the mushrooms ahead of time; the prep is very simple, but it takes an hour or two to work. First slice up some mushrooms and put them in a jar. Add enough apple cider vinegar to coat all the mushrooms when you stir them. Also throw in a splash of olive oil (or whatever oil you use).
Add your preferred flavors: today I used sliced onion and garlic, and fresh thyme. Everything goes in the jar together; make sure all the mushrooms get wet with vinegar, and then leave it for an hour or two. The mushrooms will absorb the flavors of everything in the jar, and they will shrink and put out water just like when you cook them! Delicious.
I like this served with fresh raw steak. It's also good for disguising the flavor of stinky raw meat that's been in the kitchen for a while!
