Place kumquats, oranges, and water in glass bowl. Cover and let stand in a cool place for 12 hours. Pour into medium saucepan and bring to a full, rolling boil over high heat. Cook for about 15 minutes, stirring frequently. Remove from heat and stir in lemon and Grand Marnier. Measure this mixture and add equal amount of sugar. Again bring to a boil and cook, stirring frequently, for about 30 minutes. When mixture begins to gel, remove from heat and immediately pour into hot sterilized jars. Vacuum seal. Makes 6 1/2 pint jars.
From: Gourmet Preserves, Judith Choate