For the marinade, stir olive oil with pepper, curry powder, soy sauce and allspice until smooth and brush the chicken breasts with it.
For the mango sauce, cut the mango and apple into small pieces. Cut the chilli pepper into fine rings. Mix orange juice, ginger, lemon juice, chilli, sugar and cinnamon with the fruits in a saucepan and season to taste.
Bake the chicken breasts for about 50 minutes in a non-preheated oven (e.g. in a baking dish without a lid) at 170 ° C hot air. Put a cup or small casserole dish with water in the oven so that the chicken breasts don`t dry out too quickly. Turn the breasts twice during the cooking process, brushing again with the marinade.
Bring the fruit sauce to the boil until the orange juice has boiled down. If necessary, add a little more orange juice.