In large bowl, whisk together 1-3/4 cup milk, 1/3 cup brown sugar, 1/4 cup melted butter, eggs, 1 teaspoon cinnamon, vanilla and 1/2 teaspoon salt. Add bread cubes and toss gently until all liquid has been absorbed. Pour mixture into prepared pan, pressing into an even layer 1/2 in. from the top of the pan.