Created by TeresaS on August 9, 2016
Step 1: Cook pasta according to the package directions.
Step 2: Meanwhile. fry bacon in a medium saucepan over medium heat until brown and crisp. about 10 minutes. Transfer it paper towels to drain.
Step 3: Pour off all but 1 tablespoon fat from pan. Add flour and whisk over medium heat. Pour in milk 1/4 cup at a t time, whisking well after each addition (it will be very thick at first) until incorporated and smooth. Add cheeses in 3 batches, whisking continually and making sure each batch is mostly melted before adding the next.
Step 4: Drain pasta, then stir into cheese sauce (it will thicken upon standing). Divide pasta among individual ramekins or bowls and top with bacon and chives.