Sausage White Bean & Kale Soup

Name: Sausage White Bean & Kale Soup
Prep time: 15 min
Total time: 15 min
Cuisine: World Cuisine
Ingredients: 1 tbsp. extra-virgin olive oil, plus more for serving; 1 lb. pork sausage, removed from casing if necessary; 1 medium yellow onion, chopped; 2 large carrots, peeled and thinly sliced into rounds; 2 celery stalks, thinly sliced; 4 cloves garlic, thinly sliced; Kosher salt; Freshly ground black pepper; 4 c. low-sodium chicken broth; 2 c. water; 1 tbsp. Italian seasoning; 1 bunch kale, ribs removed, leaves torn into 2" pieces; 2 (15.5-oz.) cans white beans, rinsed and drained; Freshly grated Parmesan cheese, for serving; Crushed red pepper flakes, for serving