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										In Dutch oven, heat the oil over medium heat, add onion, garlic, parsley, coriander, cumin and pepper. 
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										Cook, stirring until onion is softened, about 5 minutes. 
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										Add stock, 2 cups water, beans, tomatoes, potato and salt; bring to a boil. 
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										Reduce heat; cover and simmer until vegetables are almost tender, about 20 minutes. 
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										Add kale; cook until tender, about 15 minutes (if using spinach, cook for 2 minutes).