To shred the zucchini use a box grater - most micro planes are too fine, you want shredded zucchini, not mush. Feel free to play around with the "add-in" ingredients - for example, use whatever chopped herbs you like. I had dill on hand, and I like how it tastes with summer squash, so dill it was. I suspect anything from chopped olives, sun-dried tomatoes, or chives, to spices, chopped spinach, or corn could work here. Also, when I have the time and inclination I'll drain the ricotta through cheesecloth to get even more moisture out of the cake, but to be honest, most times I won't bother. Lastly, I use a springform pan here, but you could use an equivalent baking dish or deep tart pan as well.