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