Adding rolled oats to a NutriBlast is a great option! Also, check out some of the Diabetic-friendly Blast recipes we have right here on NL!!
It's best to use more veggies than fruit and also add in nuts, seeds, and other protein and fat sources to help slow the release of the sugar. Also, choosing lower GI fruits is another option.
Here's some helpful info!
Here's a good dessert recipe that is Diabetic friendly: http://www.nutriliving.com/recipes/apple-spice-pie (you can sub a different liquid if you'd like).