Peel and finely dice the onion and garlic. Wash and clean the zucchini. Peel and wash the carrots. Cut both into small cubes. Clean and halve the mushrooms. Heat oil in a wide pot, fry carrots, zucchini and mushrooms, add onion and garlic, fry over low heat until transparent.
Add rice, fry briefly with glassy. Gradually add wine and stock, stirring from time to time. Add the next portion of liquid only after the rice has absorbed the liquid. Cook for a total of 25-30 minutes.
Finely grate the parmesan. Add the peas to the risotto 6-8 minutes before the end of the cooking time. Season to taste with salt and pepper, stir in parmesan and butter. Arrange in bowls.