Step 1

In a saucepan, combine all the ingredients. Bring to a boil, stirring constantly.

Step 2

Cook over high heat, stirring frequently for about 30 minutes or until it thickens. Perform the plate test (see note).

Step 3

Pour into sterilized jars. Sterilize the filled and firmly closed jars in boiling water for 15 minutes for longer storage.