White Risotto

Name: White Risotto
Ingredients: 6-8 large white mushrooms – sliced (about 4 cups); ½ cup dry white wine; ½ small onion – minced; 6 cups chicken stock or broth; 4 tablespoons olive oil; 1 ½ cups Arborio rice; 2 tablespoons butter; ¼ teaspoon salt; 4-5 grinds fresh ground pepper; 1 cup fresh grated parmesan cheese; 2 tablespoons white truffle oil; additional salt and pepper to taste