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1
Place the chickpeas in a large bowl and cover with plenty of water. Let soak for 8 hours or overnight; drain.
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2
Wrap the carrot, celery, onion, 3 garlic cloves, the lemon peel, and rosemary in a large square of cheesecloth and secure with kitchen twine or a tight knot.
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3
In a large pot, combine the sachet of vegetables, the chickpeas, salt, water, and 1 cup of the olive oil. Bring to a boil over high heat, then reduce the heat to medium-low and simmer until the chickpeas are tender, about 1 hour.
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4
Meanwhile, finely chop the remaining 8 garlic cloves. In a small skillet, heat 3 tablespoons olive oil over medium heat. Add the garlic and chili flakes and cook until the garlic is fragrant but not golden, about 1 minute. Remove from the heat.
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5
Remove the center ribs from the kale and coarsely chop the leaves (you should have about 16 cups). In a large skillet, heat the remaining 7 tablespoons olive oil over medium-high heat. Add the kale in batches and cook, tossing occasionally, until tender, about 3 minutes. Remove from the heat.
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6
When the chickpeas are cooked, combine the kale, garlic oil, 2 cups of the chickpeas, and 1 cup of the cooking liquid in a food processor and puree until smooth. Return the puree to the pot and cook over medium-high heat until hot. Season with salt and pepper to taste.
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7
Ladle the soup into bowls. Finish with a squeeze of lemon, some grated Parmigiano-Reggiano, and a drizzle of olive oil.
