Heat the water with the finely chopped ginger in a saucepan and simmer for at least 10 minutes. Take the pot off the stove and let it cool down (in the refrigerator if necessary).
Pour the ginger tea with the orange juice into a pot and add the ice cubes.
This drink is very refreshing and healthy on hot summer days. Depending on your taste, you can vary the ratio of ginger tea: juice.