Cut the chicken breast into bite-sized pieces and marinate in a mixture of oil and soy sauce.
Peel and fillet one orange, squeeze the other. Cut the onion into small pieces and sauté briefly in a little oil. Add the meat and fry, stirring occasionally. Deglaze with a small dash of water, add the orange juice and stir in the sour cream or crème fraîche. Pepper the sauce very lightly and add curry and chicken broth to taste. Maybe tie something if necessary. Finally, heat the orange fillets in the sauce.