This garlicky spinach soup starts with a simple formula

Name: This garlicky spinach soup starts with a simple formula
Prep time: 20 min
Cook time: 30 min
Total time: 50 min
Cuisine: European, Mediterranean
Ingredients: 2 tablespoons olive oil, plus more for drizzling; 1 large yellow onion (about 10 ounces), roughly chopped; 4 to 5 large garlic cloves, minced or pressed; 1/4 teaspoon fine salt, plus more to taste; 1 teaspoon ground cumin; 1 teaspoon ground coriander; 3/4 teaspoon sweet paprika; 1/2 teaspoon crushed red pepper flakes; 1/2 teaspoon freshly ground black pepper; Two (15-ounce) cans no-salt-added chickpeas, drained with liquid reserved (may also use 3 cups cooked chickpeas with 1/2 cup of cooking liquid); 4 cups low sodium vegetable broth, store-bought or homemade; 2 cups (2 ounces) baby spinach; 1/2 cup roughly chopped fresh flat-leaf parsley; Juice of 1 large lemon, divided; 1/4 cup grated pecorino Romano cheese (may substitute vegan parmesan cheese) (optional); Crusty bread, for serving