Best Kale Soup Recipe - How To Make Kale Soup

Ingredients

• 1 tbsp. extra-virgin olive oil
• 1/2 yellow onion, finely chopped
• 2 stalks celery, finely chopped
• 1 leek, cleaned and thinly sliced (white and pale green parts only)
• 3 cloves garlic, minced
• 2 tsp. thyme, freshly chopped
• 1/2 tsp. red pepper flakes (optional)
• Kosher salt
• Freshly ground black pepper
• 4 c. low-sodium vegetable broth
• 2 c. water
• 2 (15.5-oz.) cans cannellini beans, drained and rinsed
• Juice of 1 lemon
• 1 large bunch kale, removed from stems and torn into medium pieces
• Freshly grated Parmesan, for serving