SPINACH-FETA PIZZA SLAB PIE

Spinach-Feta Pizza Slab Pie image

Provided by Martha Stewart

Time 1h5m

Number Of Ingredients 10

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2 bunches spinach (1 pound, 6 ounces), tough stems trimmed, washed, with water still clinging to leaves
Extra-virgin olive oil, for brushing
Unbleached all-purpose flour, for dusting
1 pound store-bought pizza dough, divided in half
8 ounces low-moisture mozzarella, such as Polly-O, thinly sliced
2 ounces feta, crumbled (1/3 cup)
Kosher salt
Pinch of red-pepper flakes
1 large egg, beaten
1 tablespoon sesame seeds

Steps:

Place spinach in a large pot over high heat; cover. Steam until just collapsed, about 3 minutes; transfer to a colander. When cool enough to handle, squeeze out excess water; roughly chop.
Preheat oven to 425 degrees, with a rack in lower third. Brush a 9 1/2-by-13-inch rimmed baking sheet with oil. On a lightly floured work surface, roll out and stretch one piece of dough into a thin 10-by-13-inch rectangle. (If dough is springing back, let stand 5 minutes.) Transfer to prepared baking sheet. Arrange mozzarella over dough, leaving a 1-inch border. Top with spinach and sprinkle with feta. Season with salt and red-pepper flakes. Roll out and stretch remaining portion of dough into a 10-by-14-inch rectangle. Drape over filling. Pinch edges to seal; slash a few vents in top. Brush with egg wash; sprinkle with sesame seeds.
Bake until golden brown all over and filling is bubbling through vents, 40 to 45 minutes. (Check color of bottom crust by lifting corner with a spatula.) Immediately slide pie off sheet onto a wire rack. Let cool completely. Before serving, cut into squares.