Heat the oil in a soup pot over medium-high heat. Add the chorizo and render 2 to 3 minutes, then remove to a plate. Add the potatoes, sprinkle with salt and pepper, and cook partially covered until lightly browned, a few minutes. Add the paprika, garlic, bay leaves and onions, and cook 5 minutes more stirring occasionally. Wilt the kale into the pot, then add the stock, tomatoes and chickpeas. Add the chorizo back to the pot. Bring the soup to a simmer and cook for 10 minutes or so. Serve with the Portuguese rolls drizzled with some oil.
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