Transfer about half the soup to an upright blender, along with the miso, and blend until just smooth. You can also do this with an immersion blender, leaving some of the soup chunky. Return the blended soup to the pot. Mix and taste for salt/pepper, adjust if needed. Turn off the heat, wilt in the spinach, if using, and mix in the lemon zest, juice, and dill. Serve the soup warm, garnished with lemon wedges, more dill, and red pepper flakes.
Notes
- Dill stems are really easy to strip with a quick motion like you would do when stemming kale. This saves a lot of time! - The flavor and acidity of fresh lemon juice dissipates quite quickly, so I recommend serving any leftovers with more squeezes of lemon juice in each bowl.
Recipe by Golubka Kitchen at https://golubkakitchen.com/lemon-dill-white-bean-potato-soup/