INGREDIENTS
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1 teaspoon plus 2 tablespoons vegetable oil
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1/2 cup onion, minced, plus 1 small onion cut into 1/2-inch dice
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2 large eggs, lightly beaten
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Coarse salt and ground pepper
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1/2 cup plus 2 tablespoons matzo meal
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2 tablespoons seltzer water
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1 whole chicken leg, split and skin removed (10 ounces)
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1 celery stalk, cut crosswise into 1/4-inch pieces
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1 carrot, halved lengthwise and cut crosswise into 1/4-inch pieces
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2 cans (14.5 ounces each) reduced-sodium chicken broth