Spanakopita Pie

Name: Spanakopita Pie
Ingredients: 4 10-ounce packages frozen chopped spinach, thawed, drained; ¼ cup olive oil; 1 leek, white and pale-green parts only, thinly sliced; ½ medium onion, chopped; 5 medium scallions, white and pale-green parts only, sliced; 2 garlic cloves, grated; Kosher salt, freshly ground pepper; 1 large egg; 1 large egg yolk; 10 ounces feta, crumbled (about 2 cups); 1 ounce store-bought finely grated Parmesan (about ¼ cup); ⅓ cup chopped basil; ⅓ cup chopped dill; 3 tablespoons chopped oregano; 1 teaspoon finely grated lemon zest; ¾ cup (1½ sticks) salted butter, melted, divided; 12 14x9-inch sheets frozen phyllo dough, thawed, room temperature; A 9-inch springform pan