Prepare the ingredients. Thinly slice the mushrooms. Cut the zucchini into cubes.

Heat the olive oil in a skillet over medium heat and sauté the onion. When it turns translucent, add the pressed garlic and cook until fragrant. Add the zucchini and cook for about 3 minutes, until slightly tender.

Add the mushrooms, stir, and cook for another 3 minutes. Season with salt, pepper, and herbes de Provence. Cook for 2 more minutes to let the flavors blend. Serve as a side dish or as a filling for an omelet.