Risotto alla Parmigiana

Risotto alla Parmigiana
2 tablespoons unsalted butter
2 tablespoons olive oil
1 medium onion, finely chopped
1 pound Arborio rice
6 cups chicken stock, hot
2 tablespoons butter
3 ounces Parmagiano Reggiano cheese, coarsely grated
Heat the butter and oil in a large, straight−sided saute pan or saucepan.
Add the onion, and saute until soft, without browning.
Add the rice, and saute for 2 minutes until the rice is well−coated. Ladle
1/2 cup of stock into the rice, stirring constantly, until all the liquid is
absorbed and the rice is almost dry. Add more stock, 1/2 cup at a time,
until it's all absorbed by the rice and the rice is al dente.
The rice should be very moist and creamy, but not runny;
the rice should be firm but tender, not crunchy.
Remove from heat, and stir in the raw butter and the Parmagiano cheese. Salt
to taste, and serve immediately