Cut the chicken into 1u0022 pieces and add it to a bowl with the sliced onions. Season with the spices and 1 tbsp of the harissa and toss together to combine. You can let this marinate for a few hours until ready to cook, or cook right away.
Heat a large skillet on medium heat then add in about 1-2 tbsp of olive oil.
Add the chicken and onions to the pan and cook for about 8-10 minutes, stirring every few minutes.
In a small bowl, combine the other tbsp of harissa, date syrup and 2 tbsp of water.
Pour the sauce into the pan and toss together. Let cook for another 5-7 minutes on medium/low heat.
Mix in the parsley and serve warm over rice with sumac onions.