In a large pot, heat olive oil over medium heat.
Add chopped onion and sauté until translucent.
Stir in minced garlic and cook for an additional minute.
Add diced potatoes and vegetable broth to the pot.
Bring the mixture to a boil, then reduce heat and simmer for 15 minutes.
Use an immersion blender to puree the soup until smooth.
Stir in the shredded kale and cook for another 5 minutes.
Season with salt and pepper to taste.
In a separate pan, lightly fry the chorizo slices until crispy.
Serve the soup hot, garnished with chorizo and a squeeze of lemon.