In 3-quart saucepan, heat whipping cream, milk, 1/2 cup of the granulated sugar,salt and vanilla bean (if you are using 1 teaspoon vanilla, do not add here) uncovered to a gentle simmer over medium heat. Simmer about 15 minutes, stirring occasionally. Remove from heat. Cover and let stand 20 minutes. (This standing time will infuse the cream with vanilla flavor; skip it if not using vanilla bean.) Remove and discard vanilla bean.