INGREDIENTS
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1 pound ricotta
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1/2 cup plus 2 tablespoons all-purpose flour plus more
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1 large egg, beaten to blend
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1 1/4 cups finely grated Parmesan
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3/4 teaspoon freshly grated nutmeg
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1/2 tablespoon kosher salt
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10 cups low-salt chicken broth
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2 pounds skinless, boneless chicken thighs
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1/4 cup (1/2 stick) unsalted butter
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6 tablespoons all-purpose flour
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2 celery stalks, cut crosswise into 1/4"-thick slices
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1 carrot, peeled, thinly sliced
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1 parsnip, peeled, cut into 1/4"-thick rounds
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1 leek, halved lengthwise, cut crosswise into 1/4"-thick slices
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1/4 cup chopped flat-leaf parsley
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1/4 cup chopped fresh chives
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Kosher salt, freshly ground pepper
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Shaved Parmesan