In a large Dutch oven or pan, add the olive oil over high heat and brown the chicken thighs for 2 minutes each sides. Season them with salt and pepper as you're browning them. Do this in batches if the Dutch oven isn't big enough to avoid stewing the meat at this stage, you're after some quick color.
Remove the chicken thighs and add the onion, garlic, and spice blend. Continue stirring and let the spices become fragrant for one minute. Be careful not to burn them at this stage. Add the chicken stock to deglaze the pan, followed by the tomatoes.
Add the remaining ingredients including the chickpeas and brine, carrots, sweet potatoes, lemon zest, and juice. Stir to combine and bring everything up to a simmer.
Add the browned chicken thighs back in and make sure they're submerged in the broth. Add the lid and transfer the stew to the oven for 40 minutes or slow cook it on the stove.
Once the sweet potatoes and carrots are tender, season the stew to taste with salt and pepper. Shred the chicken if you like and stir in the olives and fresh cilantro. Serve immediately with some Greek yogurt and garnish with shaved almonds if you like.
1/2 cup cilantro, 1/2 cup black olives
Notes
Spice blend: You can use 2 tbsp Ras el Hanout plus salt and pepper instead.Storage: Leftover stew can be stored in an airtight container in the fridge for up to 4 days or up to 3 months in the freezer.