Root Cellaring

Plum Berry Jam by Catherine Abbot

You can substitute 1 cup blueberries for strawberries.

2 cups red raspberries

1 cup strawberries

1 cup peeled, diced ripe plum

5 cups sugar

½ cup light corn syrup

¾ cup water

1 (3-ounce) package powdered fruit pectin

Mix the fruit together with the sugar and let stand for 15 minutes.
Place the fruit in a pan with corn syrup and water. Bring to a boil.
Add pectin and continue boiling for 1 minute. Cool and put into containers. This can be refrigerated or frozen; leave ½ inch of headspace if freezing.