Peel oranges and grapefruit so that the white skin is completely removed. Remove the fillets from the parting skins. Puree 2/3 of the fillets. Stir in cinnamon, sugar and lemon juice until the sugar is dissolved.
Fold in cloves and fillets. Add gel and stir in. Fill jam into glasses and sprinkle orange julienne over them as desired. Allow the jam to set overnight in a cool place