Heidi Swanson's Chickpea Stew with Saffron, Yogurt, and Garlic

INGREDIENTS

• Small bunch fresh cilantro, chopped
• 4 cups vegetable broth
• 1 large yellow onion, finely chopped
• 2 cloves garlic, finely chopped
• 3 cups cooked chickpeas or 1 1/2 (15-ounce) cans chickpeas, rinsed and drained
• Sweet paprika
• Fine-grain sea salt
• 2 tablespoons olive oil
• 1 cup plain yogurt (Greek or regular)
• 1/4 teaspoon saffron threads (2 modest pinches)
• 3 large egg yolks, lightly beaten