Harira (Moroccan Chickpea and Lentil Soup)

Bahan-bahan (8 porsi)

• 2 tablespoons oil
• 1 onion, diced
• 3 stalks celery, diced, plus celery leaves, chopped
• 4 cloves garlic, minced
• 1 teaspoon ground cumin
• 1 teaspoon ground turmeric
• 1/2 teaspoon ground cinnamon
• 1/4 teaspoon ground ginger
• 1 (15-ounce) can crushed tomatoes
• 1 tablespoon harissa, plus more for serving
• 8 cups vegetable stock or water
• 1 cup fresh cilantro, chopped, divided
• 1 cup lentils
• 1 (15-ounce) can chickpeas, drained
• Kosher salt, to taste
• Lemons wedges, to serve
• Greek yogurt and toasted almonds, to top (optional) (see note)