Chickpeas seem to call out for Moroccan spices, so that's what they get here. I make this soup really chunky and hearty.
Remove soup from heat. Use a potato masher to mash up some of the chickpeas right in the pot. Stir in the spinach and let heat through until wilted, just a couple minutes.
Season again, to taste, with salt and pepper.
Serve soup, drizzled lightly with extra-virgin olive oil, if desired.