Erbazzone Reggiano (Emilian Spinach and Cheese Pie)

Make the dough

1. Stir together flour and salt in a medium bowl. Pour in 1/2 cup water and oil; stir together using a fork until shaggy pieces of dough form. Turn out dough and any remaining flour in bowl onto a clean work surface, and press into a shaggy ball. Knead until mostly smooth and elastic, 5 to 8 minutes. Dough should be slightly tacky; lightly dust with flour as needed if sticking to hands. Wrap in plastic wrap; let rest at room temperature at least 1 hour or up to 2 hours.

Meanwhile, make the spinach filling

1. Preheat oven to 450°F with rack about 6 inches from heat source. Place spinach on a clean kitchen towel, and firmly squeeze over sink to remove as much liquid as possible; transfer spinach to a large bowl. Cook oil and garlic in a large skillet over medium-low, swirling skillet occasionally, until garlic is sizzling and light golden on 1 side, about 6 minutes. Add spinach; cook, pulling apart spinach with tongs, until coated in oil mixture and warmed through, about 1 to 2 minutes. Return spinach mixture to large bowl. Remove and discard garlic. Stir Parmigiano-Reggiano, ricotta, eggs, and salt into spinach mixture until thoroughly combined; set aside.

2. Line a large rimmed baking sheet with parchment paper. Unwrap dough, and divide evenly into 2 portions. Roll 1 portion out on a floured work surface into a 14- x 10-inch rectangle about 1/8 inch thick. Trim and discard excess dough. Gently roll dough rectangle around rolling pin, and unroll onto prepared baking sheet. Spoon spinach filling onto rectangle and spread in an even layer, leaving a 1-inch border. Roll remaining dough portion out into a 13- x 9-inch rectangle about 1/8 inch thick. Trim and discard excess dough. Gently roll dough around rolling pin, and unroll to drape over spinach filling. Using your fingers, lightly moisten edges of dough with water. Fold edges of bottom dough over top edges, and press to seal. Prick top of dough all over using a fork. Drizzle evenly with olive oil.

3. Bake in preheated oven until crust is light golden, about 30 minutes. Increase oven temperature to broil; do not remove pie from oven. Broil, watching carefully, until charred in spots, 1 to 2 minutes. Let cool 15 minutes. Cut pie lengthwise into 4 even strips. Cut each strip crosswise into 6 pieces.