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1
In the bowl of a stand mixer or a large mixing bowl, dissolve yeast in 1 cup warm water (110u00b0), about 5 minutes.
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2
Add table salt, olive oil, and 1 1/2 cups flour. Beat with a paddle attachment at medium speed or a wooden spoon until dough is stretchy, 1 to 2 minutes. Mix in enough additional flour to make a soft dough, a little more than 1 cup. Knead with a dough hook, or by hand on a floured work surface, adding flour as needed to prevent sticking, until dough is smooth, springy, and no longer sticky, 8 to 12 minutes.
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3
Sprinkle a 10-in.-square work surface with 1/4 cup flour and turn dough out onto it. Pat dough into an even 6-in. square. Loosely cover with a towel and let stand until puffy, 45 to 50 minutes.
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4
Preheat oven to 350u00b0. Line 2 rimmed baking sheets (each 12 by 17 in.) with parchment paper. With a sharp knife, cut dough vertically into 4 strips. Working with 1 quarter at a time, cut vertically again into 8 pieces, sprinkling knife with flour if dough sticks. Pick up 1 piece and stretch it to the length of the pan, then set in pan. Repeat with remaining pieces, arranging them slightly apart.
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5
Gently brush breadsticks with egg to coat, then sprinkle with sel gris and pepper.
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6
Bake breadsticks until golden and crisp in thickest parts, 45 to 50 minutes; halfway through, gently separate any stuck-together breadsticks, and switch pan positions if using 1 oven.
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7
Note: Nutritional analysis is per 2-breadstick serving.
