Preheat your oven to 350 °F
Squeeze out as much liquid as you can from your grated zucchini. The easiest way to do this is to use cheesecloth, a mesh bag or clean kitchen towel. Alternatively you can squeeze out a little at a time with your hands. Transfer to a bowl.
8 cups grated zucchini, packed
In a large skillet heat 1 teaspoon of olive oil over medium heat and saute your strained zucchini. Depending on the size of your pan you may need to do this in batches (and you may need to add additional oil with each batch). Add the green onions and cook until the zucchini browns a little bit and any liquid which gets released evaporates.
1 tsp olive oil
To your drained zucchini add the rest of the ingredients except for the filo dough and oil. Mix to combine well.
4 green onions, white and green part chopped, ½ cup fresh parsley, chopped, 2 tbsp chives, chopped, 1 tbsp fresh mint, chopped, ¾ cup crumbled feta, ⅓ cup plain breadcrumbs, 1 lemon, grated rind only, ¼ tsp pepper, ½ tsp salt, 2 large eggs, beaten
Prepare a 8 x 10 inch baking pan by brushing the bottom with a bit of oil. Layer 8 sheets of filo, brushing with a bit of oil after each sheet but, do not oil the top of the 8th sheet of filo. See Recipe Note.
½ cup olive oil, 1 lb fresh filo dough
Spread the zucchini mixture evenly over the filo dough in the pan. Use an offset spatula or the back of a spoon to make the filling as even as possible.
Top with an additional 8 layers of filo, again brushing each sheet with oil. If you have filo dough hanging over the edges of your pan, cut the excess away and fold over the rest so that you create a closed edge all around your pan. Brush the top of your zucchini pita, including the edges, with oil.
Use a sharp knife to score all the top layers of your filo. See Recipe Note. Drizzle with a bit of water.
Bake in the bottom rack of your oven for 15 minutes and then transfer to the the middle rack of your oven for an additional 15 minutes or until the filo is golden brown.
Remove from oven and allow to cool slightly before serving.