Put the brown sugar in a saucepan and let it caramelize slightly. Then peel the ginger and cut into fine strips.
Now peel off the garlic and cut into fine strips. Rinse the oranges with hot water and rub the peel into fine strips with a zest and then squeeze the oranges. Add the ginger and garlic to the caramelized in sugar and sauté lightly. Then add the orange zest and sauté briefly. Deglaze with 200 ml orange juice and the soy sauce and let everything simmer for about 1 hour.
Goes well with seared tuna, prawns and even chicken.