Slice green onions long and on the bias so you have pieces similar in shape to the cabbage. Toss together onions, cabbages, and cilantro in a large bowl.
Zest both limes and juice 1 lime. In a bowl, mix lime zest and juice, yogurt, sugar, salt, and pepper. Pour dressing over cabbage mixture; stir to combine.
Note: Nutritional analysis is per 1-cup serving.