Sauté the aromatics: Heat the oil in a large pot over medium heat. Add the onion and sauté until translucent. Add the celery and carrots, and cook for another 5 minutes.
Bloom the spices: Add the garlic, cinnamon, turmeric, and cumin. Stir for 1 minute until fragrant—this "blooms" the spices and enhances their flavor.
Simmer: Add the potato, sweet potato, and chickpeas. Pour in the water until the vegetables are covered by about 2 inches. Season with salt and pepper.
Cook: Bring to a boil, then reduce the heat to low. Cover and simmer for 40–50 minutes, or until all vegetables are tender.
The Finishing Touch: Stir in the fresh parsley during the last 5 minutes of cooking.
