Whisk half & half, 1 cup sugar, eggs, egg yolks, vanilla extract, and salt in large bowl to blend. Pour over croissant cubes in dish. Let stand 30 minutes, occasionally pressing bread cubes into liquid. Sprinkle the top with brown sugar. Bake bread pudding until golden brown, and set in center, about 1 hour. Serve warm with glaze drizzled on top.