Down South Pimiento Mac and Cheese

¼ c. kosher salt1 qt. milk6 T. butter, cut into pieces6 T. four1 lb. penne pasta, or your favorite2 (8-oz.) pkgs. shredded extra-sharp cheddar cheese½ c. finely minced Vidalia onion2 T. fresh lemon juice1 T. Worcestershire sauceTabasco, to tasteKosher salt/black…