Okay, I am givin this up!! It's AWSOME and I get TONS of compliments for this. I also add Cut up pre-cooked warm Chicken to this most of the time at the end.( I use tenders and cut them up-easier than breasts)
When done drain and put back in the pan on Med to Med- High heat, add all ingredients and stir thoroughly until you see cheese getting stringy. You can add more Cheese if you like. If you are talented, you can make the sauce while pasta is cooking-but I have found this technique is better.