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1
For the dough: Combine both kinds of flour and 1/4 teaspoon salt in a large bowl and make a well in the center.
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2
Stir 1 1/4 cups warm water with the olive oil and yeast and pour into the well in the flour bowl.
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3
Stir until a soft and shaggy dough forms and then turn out onto a lightly-floured board and knead until smooth and the dough springs back when pressed with your thumb.
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4
Transfer to a bowl coated with nonstick cooking spray, mist the dough ball, cover and let stand until doubled in size, about 1 hour.
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5
Divide the dough into 2 pieces and roll each into a ball.
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6
Cover loosely and let rest an additional 30 minutes.
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7
For the sauce: Combine the oregano, tomatoes and garlic in a small skillet and bring to a simmer over medium heat.
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8
Continue to cook, stirring and lightly mashing the tomatoes with a spatula, until the tomatoes have released their liquid and the sauce has become thick and jammy, about 15 minutes.
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9
Remove from the heat, season with salt and pepper and stir in the basil.
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10
For assembling the pizza: Place 2 baking sheets in the oven and turn the oven to 500 degrees F. Stretch and/or roll each piece of dough until very thin and place each on a piece of lightly floured parchment paper that is the same size as the baking sheets heating in the oven (the dough will be a rustic oval shape).
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11
Rub each piece of dough with 1 teaspoon of the oil, sprinkle with 1/4 teaspoon salt and 1/8 teaspoon pepper and carefully transfer to the hot baking sheets.
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12
Bake until lightly browned, 8 to 10 minutes.
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13
Remove from the oven and evenly spread each pizza crust with the sauce, spreading about 1/2 inch from the edge, and then top with the mozzarella, Parmesan and spinach.
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14
Return to the oven and continue to bake until the crust is crisp and the cheese has melted and is browned in spots, 6 to 8 minutes, rotating the pans if necessary.
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15
Remove from the oven and place small spoonfuls of the ricotta on the pizzas and sprinkle with fresh basil.
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16
Sprinkle the pizzas with salt and crushed red pepper flakes, if using.