Boil the potatoes and pumpkin in salted water for 15 mins or until tender. Mix the ras el hanout with seasoning, then sprinkle all over the chicken. Heat 1 tbsp oil in large frying pan, then brown the chicken for 3 mins on each side until golden.
Lift the chicken out of the pan. Add the stock, syrup, lemon juice, garlic infused oil and olives, return the chicken to the pan, then simmer for 10 mins until the sauce is syrupy and the chicken cooked.
Mash the potatoes and pumpkin* with 1 tbsp oil and season. Thickly slice each chicken breast and stir the coriander through the sauce. Serve the chicken and sauce over mash.
*If using a can, simply mix through the mash potato.