INGREDIENTS
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3 tablespoons olive oil
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12 Italian sausages (about 3 pounds), casings removed
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1 cup chopped onion
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1/2 cup chopped prosciutto (about 2 ounces)
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1 tablespoon minced garlic
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1/2 teaspoon dried crushed red pepper
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1 large head escarole, chopped (about 10 cups)
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3/4 cup dry white wine
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4 15-ounce cans Great Northern beans, rinsed, drained
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1 cup chicken stock or canned low-salt chicken broth
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Freshly grated Parmesan cheese (optional)