Wash and quarter the strawberries or cut into small pieces (weigh again). Add all ingredients and stir well. Then let it steep for 1 hour over a low flame. Then bring to the boil and cook over high heat for 5 - 8 minutes.
Do the jelly test (I take a small egg cup and put about 1 teaspoon of jam in it and put it in the refrigerator. When the jam is ready, it should set in no time!).
Immediately pour the jam into jars while hot and close. Turn it upside down for 20 minutes and then turn it again to see if the jars are properly closed.