Add the chicken to the slow cooker, then sprinkle all the spices over it - turmeric, cumin, smoked paprika, pepper, and salt.
Add the rest of the ingredients - onion, carrot, celery, canned chickpeas, canned tomatoes (with their juices), ginger, garlic, harissa (see notes below before adding), broth, and bay leaves. Stir to combine. Cook on low for 4-6 hours or until the chicken is cooked through and the veggies have softened.
Remove bay leaves, taste for needed salt/seasonings and garnish with cilantro. Extra delicious with some crusty bread dipped in it. Enjoy!
Notes
Moroccan harissa tends to be much more mild than Tunisian harissa, which is quite spicy. If you're using Moroccan harissa, I use a 1/2 cup. If using Tunisian harissa, I would add a couple tablespoons and then add more after it's cooked if you want it spicier.
Once they have cooled, store leftovers in an air-tight container in the fridge for up to 3-4 days.
This soup can be frozen in freezer-safe containers or freezer bags. Use within 3 months for the best quality.