This is a concoction I came up with a number of years ago. I needed to make veggie dip, and when I got out the package of ranch dip mix, I realized that I didn't have any sour cream on hand. So I decided to substitute.
Sometimes substitutes are better. This is not only healthier, it is also tastier. I never went back to sour cream!
Lowfat Ranch Veggie Dip
Put 1 C lowfat or fat free cottage cheese into blender. Blend until smooth, adding just enough skim milk to be able to blend it.
Once it is smooth, add 1/2 pkg ranch dip mix, and blend until thoroughly mixed. Refrigerate. Dip will thicken slighly after blending.