This is a Rachael Ray recipe. This is so good, I just had to sit down and post it. A few modifications: I used ziti, 2% milk, a mexican blend of cheese and quite a bit of sriracha hot sauce. I omited the thyme, simply because I forgot it. It looks and feels like I'm eating creamy mac and cheese, but its better and more sophisticated...and comforting. I usually shy away from her recipes because they have too many ingredients and take way longer than she indicates. I relented as I had all the ingredients on hand. Yum-O. seriously.