I super avoid sugar and won't use agave because, while it has a lower glycemic index, it's still a form of sugar. It might be hard to cook a treat for someone who avoids sugar. I usually make/bring my own when the situation calls for it because I know the way I eat isn't easy to accommodate.

This recipe is one of my favorites- http://www.elanaspantry.com/ratio-rally-quick-breads/ I grate/finely chop apple and use a couple packets of stevia instead of agave. And I add some cinnamon.