Chef John's Chinese Scallion Pancakes
Ingredients:
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2 cups bread flour
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1 ½ teaspoons kosher salt
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¾ cup very hot water
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3 tablespoons vegetable oil
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2 teaspoons sesame oil
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1 tablespoon all-purpose flour
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1 teaspoon all-purpose flour
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1 bunch green onions, mostly green parts, thinly sliced
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1 ½ tablespoons vegetable oil, or as needed