jam sugar (check proportions on the packaging)
Step by step
Cut the strawberry tops off. Put the strawberries in the bowl of the stand mixer.
Attach Flat Beater.
Pull Speed Control Lever to 2 and mash the strawberries for 1 minute.
Put the strawberries in a pan.
Add jam sugar and lemon juice.
Bring to boil and cook for 3 minutes, stirring continuously.
Put the hot jam into clean jars, close and let cool.