I too love ranch...but HATE fat free ranch. So in my efforts to taste a normal ranch dressing (or closer to it then then other stuff) I came up with this recipe. Lets face it nothing is as good as the high fat stuff, but this is pretty darn good if I do say so myself.
1 container fat free sour cream
1 package ranch dip (the dry stuff)
Skim milk to desired thickness
I mix the sour cream and ranch packet together as a dip, and then when I want dressing I just add some skim milk until its the consistancy that I like. I suppose if you like plain fat free yogurt you could use that as well. I not only put this on salads, but baked potatoes as well. YUMMY!