The French Bread
Ingredients:
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2 cups sourdough starter
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10 tablespoons water
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1 ½ teaspoons olive oil
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1 teaspoon salt
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1 tablespoon white sugar
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1 tablespoon active dry yeast
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4 cups all-purpose flour, or more if needed
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2 teaspoons cornmeal
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2 cups boiling water
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1 egg yolk
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1 tablespoon milk