Melt butter in a heavy large saucepan over medium heat. Add sage and cook until butter is golden brown, about 2 minutes. Whisk in flour and cook for 1 minute. Whisk in wine and simmer for 2 minutes. Whisk in Alfredo sauce. Gradually add cheese, whisking until cheese melts and mixture is smooth. Transfer mixture to a fondue pot, chafing dish or ceramic bowl. Serve with bread and potatoes.
Recipe courtesy "Sandra Lee Semi-Homemade Cooking," Miramax Books, 2002