Any chance greek yogourt would be acceptable as topping, instead of sour cream? (ambitiouskitchen.com)
I grew up on a dairy farm, and as a teenager, made many batches of yogourt from whole, raw milk; it's taste was unlike anything available commercially, so absolutely creamy and delicious. (davidlebovitz.com)
The ginger - yogourt adds a great little kick, and this is a super dish to pack up individually to take to work / school. (epicurious.com)