INGREDIENTS
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Dough
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¾ cup lukewarm water (approximately 110°F)
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2½ teaspoons (1 .25-ounce packet) active dry yeast
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Pinch plus 3 tablespoons sugar
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4 large eggs: 3 for the dough,
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1 for the egg wash
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3¾ cups bread flour, plus more for the counter
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12 tablespoons (1½ sticks) salted butter, softened, plus more for the bowl
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2 teaspoons fine sea salt
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Filling
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1 pound medium-lean ground beef
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Fine sea salt and freshly ground black pepper
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3 tablespoons salted butter
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1 large Vidalia onion, diced
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3 cloves garlic, minced
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2 teaspoons minced fresh thyme, or 1½ teaspoons dried
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1 teaspoon minced fresh rosemary, or 1½ teaspoons dried
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1 tablespoon canola oil, plus more for the baking sheet
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8 ounces baby spinach