Heat 3 tablespoons olive oil in a large pot over medium heat. Add the garlic, onion, red pepper flakes, rosemary and pancetta, if using, and cook 2 minutes. Stir in the tomatoes and cook 2 more minutes; season with salt. Add the beans, 3 quarts water, the bay leaves and parmesan rind. Cover and bring to a boil, then reduce the heat to low and simmer until the beans are tender, 1 hour 30 minutes to 2 hours.
Uncover the pot and bring the mixture to a boil over high heat. Add the pasta and cook until al dente, about 8 minutes. Add the kale and cook, stirring occasionally, until tender, 5 to 6 more minutes. (The soup should be thick and creamy; thin with water, if necessary.)
Remove the bay leaves, parmesan rind and pancetta, if used. Add the grated parmesan, parsley, the remaining 2 tablespoons olive oil, and salt and pepper to taste. Top with more olive oil and parmesan.
Photograph by Tina Rupp
Courtesy of Food Network Magazine
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