Mushrooms should be cut not large and boiled in salted water. This can be done in advance. I took wild mushrooms, you can use both mushrooms and oyster mushrooms, it will be delicious with everyone. In a saucepan, I poured 1 tbsp of olive oil, which can be replaced with sunflower oil. Heated it and put finely chopped garlic, a minute later-the onion is also finely chopped. Gilded and added first grated carrots, a couple of minutes later zucchini, cut into small cubes.