Orange-Grapefruit Marmalade With Ginger

Recipe Instructions Cut fruit in half, squeeze out juice and pulp, discard seeds. The volume of this should be approximately 4 cups. Remove zest, this should yield approximately 1/2 cup. Transfer juice, pulp and zest to a large glass bowl. Cover and refrigerate for 24 hours. This helps the peel to soften. After soaking, put the citrus in a large stockpot. Add 6 cups of water, simmer for 1 1/2 hours. A sample of the peel should feel quite tender if rubbed between fingers. Add sugar and ginger. Bring to a boil, stirring constantly with a wooden spoon. Boil hard for 20 minutes until sugar is dissolved and mixture is thickened. If the mixture foams up, add a pat of butter and the froth will subside. Test for jell-point: drop a small amount of hot marmalade on a chilled plate. Return to the freezer for 1 minute. If surface forms a skin, it has reached jelling point, if still syrupy, continue cooking and test again in 5 minutes. Remove from heat, stir in pectin. Cool for 15 minutes, spoon into half-pint sterilized jars leaving 1/4-inch headspace and seal. This recipe yields 1 pint.