1 16-ounce Package package of rigati pasta ((or other small pasta shells))
1/4 cup butter
1/2 cup all-purpose flour
2 1/2 cups milk (2% or whole)
6 Slices white American cheese (chopped)
8oz extra-sharp white Vermont cheddar (shredded)
1/2 tablespoon Dijon mustard
1 teaspoon kosher salt
1/4 teaspoon hot sauce