1: Prepare the Carnaroli rice as per the package instructions.
2: In a pan, melt butter and sauté the leek until soft.
3: Add the rice and stir until well mixed with the butter and leek.
4: Gradually add stock or water while stirring until the rice is creamy and cooked.
5: Stir in Parmesan cheese and finely sliced prosciutto just before serving.
