Risotto with Porcini mushrooms & Tomato, Cordero

Lovely meal, and so easy to make!
Melt a knob of butter in a pan, pour the rice and toast it for a minute, stirring it. Add half a glass of white wine and let it evaporate, cover the rice with hot broth and turn it from time to time. When necessary add some hot stock. When cooked, stir and serve.