1-1/2 Tbs. extra-virgin olive oil
1 lb. sweet or hot bulk Italian sausage, broken into bite-sized pieces
1 medium yellow onion, finely chopped (1-1/2 cups)
1 medium carrot, peeled and finely chopped (3/4 cup)
1 medium celery stalk, finely chopped (3/4 cup)
1-1/2 tsp. minced fresh rosemary
2 Tbs. tomato paste
2 large cloves garlic, minced (1 Tbs.)
1 quart homemade or lower-salt chicken broth
Two 15-oz. cans cannellini beans, rinsed and drained
6 oz. Lacinato kale, center ribs removed, leaves chopped (about 4 firmly packed cups)
1 Parmigiano-Reggiano rind (1x3 inches; optional)
1-1/2 tsp. cider vinegar
Kosher salt and freshly ground black pepper
- Heat 1 Tbs. of the oil in a 4- to 5-quart pot over medium heat. Add the sausage, crumbling. Cook until browned about 8 minutes.
- Add the onion, carrot, celery, and rosemary and cook, stirring occasionally, until the vegetables begin to soften, about 6 minutes.
- Add the tomato paste and garlic and cook until fragrant, 45 seconds. Add the broth, beans, kale, and Parmigiano rind (if using). Bring to a boil, reduce the heat to medium low, and simmer gently until the vegetables are tender, about 15 minutes.
- Bring to a simmer over medium-high heat. Cook 5 minutes more to meld the flavors. Stir the cider vinegar into the soup and season to taste with salt and pepper.
- Soup, Main Dishes