1/4 ts Ground cinnamon. To make Microwave Jam: Only a small amount of fruit necessary and NO pectin. And the jam cooks up so fast you can even serve it warm 20 minutes after you start. Color and flavor are lovely, too. Store in the refrigerator for up to three months---OR IT CAN BE FROZEN. (which is what we do!) Prepare specific fruit as directed below. Place in a 3-quart casserole. Add specific amount of sugar, butter, lemon juice and flavoring. Cook, UNCOVERED, on high about 15 minutes, boiling. Boil ONLY 2 minutes. Test again. StrAWBERRY JAM: Crush about 3 1/2 cups of whole berries to make 2 cups. Add: 1 1/2 cups sugar, 1/2 teaspoon butter, 1 1/2 tablespoons lemon juice. Cook as above. RASPBERRY JAM: 3 cups berries to make 2 cups fruit. Add 1 1/2 sugar, 1/2 t. butter, 1 T. lemon juice. BLUEBERRY JAM: SLIGHTLY crush about 3 cups berries to make 2 cups. 1 12/ C. sugar, 1/2 t. butter: 1/4 c. lemon juice, 1/2 t. grated lemon peel and SWEET CHERRY JAM: Remove pits from 1 lb. of fruit. Cut in quarters to make 2 cukups. Add 1 1/2 C. sugar, 1/2 t. butter, 1/4 C. lemon juice, 1/2 t. grated lemon peel, a 2-inch cinnamon stick after cooking. PLUM JAM: Remoe pits and chop about 1 lb. plums to make 2 cups. Add 1 1/2 cups sugar, 1/2 t. butter, 1 T. lemon juice. All these are to be cooked as above.