Zucchini Bread-and-Butter Pickles with Ginger

I developed this recipe based on an email correspondence with my friend David Centner, Aka father kitchen (whom I met via chowhound). He said he likes B&Bs with coriander, and also ones made with zucchini instead of cucumbers. For health reasons he prefers not to eat sweet things, though, so I made these much less sweet than standard versions, which can be extremely cloying, and used agave nectar, which purportedly does not raise blood sugar as much as sugar or h