Berry Jam - cooking recipe

Ingredients

1 kg berries (raspberries, blackberries, boysenberries)
1 kg sugar
1 lemon, juice of

Preparation

Heat berries in a large pot until boiling.
Add lemon juice and boil for 2 minutes.
Add sugar gradually.
Stir well.
Bring to boil and boil for 10 minutes.
Remove from heat.
Stand for 2 minutes.
Pour in sterilized jars and seal.