A discovery made since going on a diet: greek yogurt.
What makes it special is the amount of protein it has compared to normal yogurt (roughly double of that normal yogurt!).
Here is my favourite brand:
http://www.fageusa.com/products.aspx?prevSect=home#/products/zero

I know it’s pink and the name isn’t the most fortunate one, but nutrition-wise it is as good as yogurt gets :)