Christmas Jelly - cooking recipe

Ingredients

4 (10 oz.) pkg. frozen strawberries (without sugar)
1 lb. fresh cranberries
10 c. sugar
1 pkg. Certo pectin

Preparation

Grind the cranberries. Combine with strawberries and sugar. Cook over medium heat to boil. Boil 1 minute. Take off heat and add the pectin.
Stir well.
Let set 5 minutes. Skim off foam. Put in jars and seal.