Icing For Diabetics How Do You Make Homemade Icing For A Homemade Cake?

How do you make homemade icing for a homemade cake? - icing for diabetics

They decided to find a cake for my family and friends, but some people with diabetes and can not eat ice cream cake very sweet. How can I use to have bought, save for glazes. A few days ago I was watching TV and saw the cake of ice, and were with eggs. I do not know whether to protein, as it is cooked. Use egg whites for the icing such a good idea? Or I should do something else? Can you help me?