Combine 5 cups milk, rice, 1/2 cup sugar, cinnamon, vanilla and salt in heavy medium saucepan. Bring to boil. Reduce heat to low and cook until rice is tender and mixture is thick, stirring frequently, about 50 minutes. Mix in Sherry and 1/2 cup brown sugar.
Serve pudding hot or well chilled. Thin with milk if pudding is too thick. Spoon into bowls. Press additional brown sugar through sieve atop puddings and serve.
