2 oranges, zested
6 cups fresh cranberries
20 oz/600 g frozen strawberries, thawed 1 hour
1/2 tsp allspice
1/2 tsp cinnamon
8 cups sugar
1 cup water
2 (3 oz) pkgs liquid fruit pectin
Zest both oranges. You should have about 4 tsps. Set aside.
Then peel the oranges and quarter.
In a food processor pulse the cranberries and oranges coarsely.
Add the strawberries.
Remove from heat and skim off the foam.
I looked up why the foam should be removed. It makes air pockets in the jam that you don't want as it could cause bacteria to grow. But don't throw the foamy jam out, just put it in a jar, keep it in the fridge and use first.
Sterilize jars. I pour boiling water in the jars. The lids get the same treatment.
Fill and process in a hot water bath 10 minutes.