This recipe does not include a bread dough, so it is not really a pizza. But it is a marvelous pizza-like dish for vegetarians and zucchini fanciers of all persuasions. It should be baked in a 9"pie pan , not a flat pizza pan.
Heat the oven to 400°. Squeeze the excess moisture out of the grated zucchini with paper towels. Mix the zucchini, the 2 beaten eggs and 1 1/2-cups of the mozzarella together and fill the bottom of the pie pan with the mixture. Bake the mixture for about 10 minutes. Remove the pan from the oven and spread the tomato sauce, the fresh vegetables and the remaining cheeses over the zucchini. Crumble the oregano between your hands onto the cheese. Dribble the olive oil over the top and bake for 25 minutes. Do not let the cheese get overly browned.