Put 2 saucers in the freezer before you start making your jam.
In a large saucepan crush the strawberries with a potato masher, mash to your desired texture of Jam.
Add the sugar and lemon juice to the strawberries.
Heat the mixture gently, stirring until all the sugar has dissolved.
Bring the mixture to a rolling boil. Continue stirring to prevent the jam from sticking to the pan, do this for 5 minutes.
- Remove the pan from the heat.
When you want to check if your jam is set, take the chilled saucer out of the freezer and place a few drops of jam onto it. After 15-20 seconds use the tip of your finger to gently push the edge of the jam, if it wrinkles, it is done. If not, continue cooking the jam for a further 3-5 minutes and test again.
Once ready, ladle the hot jam into a 240 ml sterilized jar and seal it immediately with a lid. Once cool, store the jar in a cool, dry, dark place.