Thinly slice the onion and garlic.
Cut zucchini and king oyster mushrooms into thin strips resembling capellini pasta.
Heat olive oil in a pan and sauté garlic and peperoncino.
Add onion and stir-fry.
Add zucchini and mushrooms, and stir-fry over high heat.
Season with salt and pepper.
Serve on a plate and drizzle with a bit of olive oil.