Heat the broth. Pour the oil into a cast-iron pot or pan and add finely chopped onion and garlic. Sauté until translucent and add the rice, mix well and sauté for about 3 minutes.
Deglaze with the vermouth, season with pepper and salt, and add saffron. Now add a ladle of broth to the rice each time, stirring until completely absorbed, then add the next ladle, repeating until the broth is completely used up.
Stir in the cheese and butter at the end, serve immediately.
Tips
For risotto it is best to use carnaroli, arborio or round rice. With the leftovers of the risotto you can make a delicious aperitif: Arancini!