Heat olive oil in a large cast-iron skillet over medium-high heat. Pour the onion into a saucepan and cook, stirring occasionally, until golden brown, about 8 minutes. Then add cumin, paprika, turmeric, salt, cinnamon, ginger, garlic, and chicken fillet to the onions. Cook the chicken stew, stirring occasionally, for about 1 minute.
Then add broth, pumpkin, olives, and prunes to a saucepan, bring the mixture to a boil over medium heat. Cover saucepan, reduce heat and simmer the stew for about 10 minutes until the pumpkin is soft.
Serve the finished chicken stew immediately, garnished with fresh parsley leaves.
This chicken stew is well served with couscous (optional).