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 would 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.
In the meantime, combine the ricotta cheese, Parmesan cheese, shallots, garlic, dill and lemon zest in a medium bowl. Stir in the eggs and continue mixing until well combined. Now stir in the shredded zucchini. Fill the springform pan with the ricotta mixture and place on a baking sheet. Place in the oven and bake for sixty minutes. If there is any moisture left on top of the cake at this point, carefully use a bit of paper towel to dab it off. Now sprinkle with the goat cheese and return to the oven for another 20 to 30 minutes or until the goat cheese is melted and the cake barely jiggles in the center (it will set up more as it cools).