Sweat the Zucchini: Drop your completely raw, heavily shredded zucchini directly into a massive metal colander resting entirely in your kitchen sink. Aggressively toss the green shreds with the heavy kosher salt, letting it violently sit for exactly 20 minutes to aggressively bleed out the hidden water.
Squeeze the Vegetables: Dump the heavily salted, wet zucchini directly into the center of a totally clean, heavy cotton dish towel. Fiercely twist the fabric into a tight ball, violently squeezing the heavy bundle over the sink until every drop of water is aggressively ripped out.
Drain the Spinach: Take your completely thawed, wildly wet frozen spinach and violently squeeze it with your bare hands over the sink until it becomes remarkably dry.
Build the Heavy Binder: Crack your massive eggs directly into a gigantic glass mixing bowl, violently whisking them until completely smooth. Aggressively crumble your rich feta block directly into the bowl, then add the sharp parmesan, minced garlic, chopped scallions, fresh herbs, and black pepper.
Fold the Base: Drop your violently squeezed, incredibly dry zucchini and your totally drained spinach completely into the heavy egg mixture. Use a sturdy wooden spoon to aggressively fold the massive pile of greens until every single dry shred is fiercely coated in the wet batter.
Bake the Hot Casserole: Scrape the violently heavy vegetable mixture completely into a richly oiled 9x9 heavy ceramic baking dish, smoothing the top perfectly flat. Throw the heavy dish directly into a screaming hot 375°F (190°C) oven for exactly 45 minutes until the center violently sets and the edges fiercely turn deeply dark brown.
Rest and Serve: Pull the violently dripping, wildly hot ceramic dish entirely out of the blazing oven and let it vigorously rest on the counter for exactly 10 minutes before aggressively slicing and serving!