1 tbsp (15 ml) extra-virgin olive oil 1 small shallot, thinly sliced 2 garlic cloves, lightly smashed 1 strip lemon zest (about 2 x 3 inches) or 1 tsp pared zest Pinch red pepper flakes (optional) 1 / 3 cup (80 ml) dry white wine (optional) 6 cups (1.4 L) low-sodium chicken broth 1 Parmesan rind (2–3 oz / 55–85 g) 1 small bay leaf 6–8 whole black peppercorns 2 cups (60 g) baby spinach, lightly packed 1–2 tbsp (15–30 ml) fresh lemon juice, to taste Fine sea salt, to taste 2 tbsp (8 g) chopped fresh basil, for serving Extra-virgin olive oil, for finishing
Warm olive oil in a medium pot over medium heat. Add shallot, garlic, lemon zest, and red pepper flakes (if using). Cook, stirring, until fragrant and translucent, 2–3 minutes. Pour in white wine (if using) and simmer 1 minute to reduce slightly. Add chicken broth, Parmesan rind, bay leaf, and peppercorns. Bring to a gentle simmer, then cook uncovered over low heat for 20–25 minutes to infuse flavor. Strain the broth into a clean pot, discarding solids. Return to a gentle simmer. Stir in spinach until just wilted, 30–60 seconds. Add lemon juice and season with salt to taste. Ladle into warm bowls. Top with chopped basil and a light drizzle of olive oil. Serve immediately. (If you don’t have a rind, stir in 2 tablespoons finely grated Parmesan off heat instead.)
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