Instructions:
- In a large pot, heat olive oil over medium heat. Add chopped onion and minced garlic, sautéing until softened.
- Add cannellini beans, vegetable broth, chopped kale, dried rosemary, lemon juice, and lemon zest to the pot. Bring to a boil, then reduce heat and let it simmer for about 15-20 minutes.
- Use an immersion blender or transfer a portion of the soup to a blender to puree until smooth. Leave some beans and kale chunks for texture if desired.
- Stir in heavy cream if using and season with salt and pepper. Simmer for an additional 5-7 minutes.
- Adjust seasoning if needed and serve the soup hot, garnished with Parmesan cheese if desired.
Nutritional Overview (Approximate Values for 1 Serving):
- Calories: 300-400 kcal
- Protein: 10-15g
- Carbohydrates: 35-45g
- Dietary Fiber: 10-15g
- Fat: 15-20g
- Saturated Fat: 5-8g
- Cholesterol: 20-30mg
- Sodium: 600-800mg