Oh, beef jerky. You are delicious and nutritious. Sometimes soft, sometimes chewy. Sometimes spicy, sometimes sweet.
Mushroom jerky? Don't worry about it. It's a different sort of beast... chewy and savory, sure. Meaty, yes. But different.
Here I roasted and dried four types of mushrooms in a two-step process. There are shiitake, oyster, clam shell, and shimeji. You're basically sucking out the moisture so all you're left with is the mushroom's essence: the earthy, umami-ed soul of the thing.
What's great about using a variety of mushrooms is that you can get a range of textures. The shiitake get thin and leathery. You'll have to yank at it with your teeth. The oyster mushrooms are still pillowy, but not until your teeth snap through the surface. And the clam shell and shimeji are somewhere in between: chewy on the bottom, tender on top.
It's not beef jerky, but it's just as good.
Preheat oven to 35o degrees Fahrenheit. Toss your mushrooms in olive oil, salt and pepper. Sprinkle thyme on top. De-leaf them if you want the thyme to stick. Keep them whole if you want a lighter touch. Roast for 50 minutes then turn off the oven and leave there for two or more hours to dehydrate.