Peel, core, and cube the pears.
Sauté the onion in the butter in a large frying pan
until softened.
Stir in the rice and cook for 2 minutes.
Add the wine and cook until evaporated.
Add a
ladleful of boiling stock and the pears.
Continue adding stock, 1/2 cup (125 ml) at a time,
stirring often until each addition is absorbed,
until the rice is tender, 15-18 minutes. Season with
salt and pepper.
Add the Fontina and liqueur just before serving.
Stir well and serve hot.