I have done quite a bit of reading about the Budwig diet, and it seems that as an alternative to cottage cheese you could use quark. It makes it taste much, much nicer, especially with some cinammon and some berries. I have it every morning because it's delicious - tried the cottage cheese for awhile but the consistency put me right off.
Also, I don't think yogurt works too well - something to do with the sulphur content, but I don't remember exactly. Sulphur in itself is a very interesting element and should be researched. I think it's one of the primary ways your body moves oxygen around your body.