Bacon Mac

* 3 1/4 teaspoons salt, divided * 12 ounces strozzapreti or penne pasta * 4 teaspoons all-purpose flour * 1 1/2 cups skim milk, divided * 2 cups finely shredded...See more » * 3 1/4 teaspoons salt, divided * 12 ounces strozzapreti or penne pasta * 4 teaspoons all-purpose flour * 1 1/2 cups skim milk, divided * 2 cups finely shredded sharp cheddar cheese, divided * 1/4 cup sliced green onions * 1 teaspoon hot sauce * 1/4 teaspoon pepper * 2 slices center-cut bacon, cooked and crumbled * Cooking spraySee less »