Mix egg, milk, flour and sugar to a smooth dough and let it rest for 20-30 minutes. In the meantime, peel 1 orange so that the white skin is completely removed. Remove the fillets with a sharp knife between the parting skins.
Squeeze the juice out of the parting skins. Halve 1 orange and squeeze the juice. Mix mascarpone, 2 teaspoons icing sugar and whole orange juice.
Heat the oil in portions in a coated pan and bake 6 golden-brown crêpes from the dough, one after the other. Roll them up into a bag and fill with mascarpone cream, orange fillets and cranberries.
Arrange, dust with icing sugar and decorate with lemon balm.