"This classic Italian-American comfort food works with any kind of sausage, but Chef John prefers the fennel and anise flavors of sweet Italian sausage with the beans...."
INGREDIENTS
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1 tablespoon olive oil
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12 ounces sweet bulk Italian sausage
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1 stalk celery, diced
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1/2 yellow onion, chopped
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3/4 cup dry elbow macaroni
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1/4 cup tomato paste
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3 cups chicken broth, or more as needed, divided
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Salt and freshly ground black pepper to taste
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1/4 teaspoon crushed red pepper flakes, or to taste
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1/4 teaspoon dried oregano
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3 cups chopped Swiss chard
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1 (15 ounce) can cannellini (white kidney) beans, drained
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1/4 cup grated Parmigiano-Reggiano cheese, plus additional for serving, or to taste