Morrocan Spiced Chickpea Soup

Chickpeas seem to call out for Moroccan spices, so that's what they get here. I make this soup really chunky and hearty.

• 1/4 cup extra-virgin olive oil, plus more for garnish
• 1 large onion, medium diced
• 6 to 8 cloves garlic, pressed
• 1 teaspoon ground cinnamon
• 1 teaspoon ground cumin
• 1/8 teaspoon cayenne pepper
• 1 heaping teaspoon sweet paprika
• 1 (14.5-ounce) can chopped tomatoes
• 3 (15-ounce) cans chickpeas, drained and rinsed well
• 1 quart vegetable broth or reduced-sodium chicken broth
• 1 teaspoon sugar
• Kosher salt
• freshly ground black pepper
• several kale leaves (to taste)