One year, I had grown such a heavy crop of courgettes that I didn't know what on earth to do with them. Even my neighbours were sick of courgettes. So I put them through my electric vegetable juicer and used that instead of water to make delicious glowing green incredible hulk bread. It's Ph didn't impede yeast growth. I'm about to do the same for the insane number of pumpkins from this year's harvest, for nutritious orange loaves. I'll post a pic or two, when I feel overwhelmed by my 45 remaining pumpkins, and start frantically juicing them to make space.