3 Fresh Blueberries
1/2 Frozen Blueberries
Puree blueberries in blender or food processor.
Place in a 12-cup microwave-safe dish with sugar and cinnamon.
Microwave on High, uncovered, for 8-10 minutes — until mixture comes to a full roiling boil and boils for one full minute.
Stir well once during cooking.
Remove from microwave and pour into sterilized jars.
Cover and refrigerate.
Keeps well for at least two weeks.