Combine first 6 ingredients in a large Dutch oven, stirring well; bring to a boil over high heat, stirring frequently.
Add sugar, and return to a boil; boil 1 minute, stirring constantly.
Remove from heat, and skim off foam with a metal spoon.
Quickly ladle jam into hot jars, leaving 1/4-inch headspace; cover at once with metal lids, and screw bands tight.
Process in boiling-water bath 15 minutes.