Red Onion Jam

3 C. Peeled, thinly sliced red onions
1 1/2 C. Apple juice
3/4 C. Red wine vinegar
1 tsp. Dried sage
1/2 tsp. Pepper
5 C. Sugar
1/2 C. Packed light brown sugar
1/2 tsp. Margarine
1 Pouch liquid pectin

Mix all ingredients except pectin. Place over high heat; bring to a full rolling boil and stir constantly. Skim off foam with metal spoon, remove from heat. Ladle into sterilized jars, then water bath process for 5 min.