Step 1: Brown the Sausage
1. Heat Oil: In a large pot or Dutch oven, heat the olive oil over medium heat.
2. Cook Sausage: Add the Italian sausage to the pot. Cook, breaking it up with a spoon, until browned and fully cooked, about 5-7 minutes. Remove the sausage and set aside.

Step 2: Sauté Vegetables
1. Add Onion: In the same pot, add the diced onion and sauté for about 3-4 minutes until translucent.
2. Add Garlic: Stir in the minced garlic and cook for another minute until fragrant.

Step 3: Add Cauliflower and Broth
1. Combine Ingredients: Add the chopped cauliflower to the pot, along with the cooked sausage.
2. Add Broth: Pour in the vegetable or chicken broth and bring to a boil.
3. Season: Stir in the dried thyme, dried oregano, salt, and pepper.

Step 4: Simmer the Soup
1. Cook: Reduce the heat to low and let the soup simmer for about 15 minutes, or until the cauliflower is tender.

Step 5: Add Kale
1. Stir in Kale: Add the chopped kale to the pot and cook for an additional 5 minutes until the kale is wilted and tender.

Step 6: Serve
1. Taste and Adjust: Taste the soup and adjust seasoning if necessary.
2. Optional Toppings: Serve hot, garnished with grated Parmesan cheese if desired.