Wash the strawberries thoroughly and remove the stems.
Cut the strawberries into suitable sizes.
Place the strawberries and sugar into a pot and let them sit for 30 minutes.
Simmer the mixture of strawberries and sugar over medium-low heat, stirring continuously.
When it comes to a boil, skim off the foam and keep stirring until the mixture thickens.
Add lemon juice and boil for an additional 5 minutes.
Pour the finished jam into sterilized glass jars and seal tightly.