Directions

1. In a large bowl, combine flour, 1/4 teaspoon salt, yeast, and 1/2 cup water. Stir until blended; dough will be shaggy and rough. Let dough rest in a warm place (about 72 degrees) until doubled in volume, about 3 hours.
2. Turn dough out onto a lightly floured work surface and cover with a clean, damp kitchen towel. Let stand until doubled in size, 30 minutes to 1 hour.
3. Place a pizza stone on the lowest rack of oven and preheat to 550 degrees for 25 minutes.
4. Flatten dough into a disk that is thicker in the center than at the edges. Using your fingers, gently pull on the edges of the dough to form a 6- to 8-inch circle; dough should still be thicker in the center. Drape dough over both hands, and using your knuckles, work dough out from the center into a 12-inch circle.
5. Carefully transfer dough to hot pizza stone. Working quickly, top dough with cheeses, pepper, garlic, and spinach; season with salt. Bake pizza until spinach is wilted and slightly browned, about 10 minutes.
6. Using a pizza peel, remove pizza from oven and drizzle over olive oil; serve immediately.