Thanks for the invite -- your cranberry salsa sounds delish!! And the Beck book is available on Amazon (plus workbook which is I think worth it . . . ). I'm interested in the "green Beck book" but for the moment just digesting this great big pig in the python . . .
I wouldn't consider a total fast myself. My fast days a 500 calories as per the Fast Diet or 5:2 diet. Sounds like you are doing something a little similar there. I think there is particular value in the long period with no food, it does good things for the metabolism, blood sugar, blood pressure, etc, so you might find this suits you very well indeed. Just on the QT I think that the failed days where I haven't quite got it down to 590 calories are an extra bonus!