Beef And Mushroom Risotto

Ingredients

• One 1-pound beef tenderloin, trimmed of fat
• 1 teaspoon salt
• 1/2 teaspoon freshly ground black pepper
• 2 tablespoons olive oil
• 2 cups chopped yellow onions
• 1/2 pound white button mushrooms, wiped clean, stems trimmed, and thinly sliced
• 2 teaspoons chopped garlic
• 1 pound (2 cups) Arborio rice
• 6 cups beef broth
• 1/2 cup heavy cream
• 1 tablespoon butter
• 1/4 pound Parmigiano-Reggiano cheese, grated
• 1/2 cup chopped green onions or scallions (green part only)