Bring the orange juice with butter and 3 tablespoon maple syrup to the boil. Add the oatmeal and let it soak for 5 minutes over a medium heat, stirring several times.
Peel the orange and clementine so that the white skin is completely removed. Cut out the fillets between the separating skins. Heat the milk.
Arrange the hot porridge with the milk and the fruit in bowls and serve immediately, drizzled with 1 tablespoon of maple syrup.