I love my food processor as much as the next person, and I like how it makes long, boring kitchen tasks go faster. But shredding the zucchini in your food processor is a mistake for this recipe. The pieces of zucchini will be too big, and instead of melting away into the muffins, they'll stick around a be big zucchini chunks. Instead, use the large holes on a box grater, even though it will be tedious. :)