Peel and finely chop the onion. Fry in 20 g hot butter until translucent. Add rice and steam briefly. Add wine and let it boil down. Add stock and let it swell at low heat for about 20 minutes.
In the meantime, clean, wash and dice the peppers. Add the bell peppers and peas 10 minutes before the end of the cooking time and cook with them. Fold in remaining butter, parmesan and ham. Season with salt and pepper. Garnish risotto with chervil leaves if necessary