1 tbsp (15 ml) extra-virgin olive oil, plus more for finishing 1 small shallot, finely chopped 2 cloves garlic, thinly sliced 1 / 4 tsp crushed red pepper flakes (optional) 4 cups (960 ml) low-sodium chicken or vegetable broth 1 strip lemon zest (2 to 3 inches) or 1 / 2 tsp finely grated lemon zest 1 small Parmesan rind (about 1 oz / 28 g; optional) 1 bay leaf 4 fresh thyme sprigs or 1 / 2 tsp dried thyme 1 (15 oz / 425 g) can cannellini beans, drained and rinsed 1 small head escarole, chopped (about 5 packed cups / 120 g; or 4 cups chopped Tuscan kale) 1 / 4 cup (60 ml) dry white wine (optional) 1 to 2 tbsp (15 to 30 ml) fresh lemon juice, to taste Kosher salt and freshly ground black pepper, to taste 2 tbsp (8 g) chopped fresh parsley (for serving) Shaved or finely grated Parmesan, for serving (optional)
Warm the olive oil in a medium pot over medium heat. Add the shallot and a pinch of salt; cook, stirring, until translucent, 2 to 3 minutes. Stir in the garlic and red pepper flakes and cook until fragrant, 30 seconds. If using, pour in the white wine and simmer, scraping the pot, until mostly reduced, about 1 minute. Add the broth, lemon zest, Parmesan rind (if using), bay leaf, and thyme. Bring to a gentle simmer and cook 8 to 10 minutes to infuse. Stir in the cannellini beans and escarole. Simmer until the greens are tender but still bright, 5 to 8 minutes. Remove and discard the bay leaf, thyme stems, lemon zest, and Parmesan rind. Stir in 1 tablespoon lemon juice; taste and add more lemon juice, salt, and pepper as needed. Ladle into warm bowls. Finish with a light drizzle of olive oil, chopped parsley, and a little shaved or grated Parmesan, if desired. Serve immediately.
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