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Ingredients
- 2 tablespoons olive oil
- ½ onion, diced
- salt to taste
- 8 ounces spicy Italian sausages, casings removed
- 3 ½ cups low-sodium chicken broth, divided, or as needed
- 1 ¼ cups orecchiette pasta, or more to taste
- ½ cup roughly chopped arugula, or to taste
- ¼ cup finely grated Parmigiano-Reggiano cheese, or to taste
