Place the raspberries, sugar, and lemon juice into a preserving pan or similar.
800 g of raspberries, 700 g of granulated sugar, 5 tbsp of lemon juice
Stir occasionally over a gentle heat until all the sugar crystals have dissolved.
Bring the mixture to a rolling boil and time for 7 minutes.
Test the set of the jam by placing a few drops onto a chilled saucer and checking for a crinkle and jelly-like consistency.
If the jam isn't ready, continue boiling for another 2 minutes at a time and re-test.
Once the jam has reached the desired consistency, it's time to pot it up
Use a ladle to pot up the jam into sterilized jars.
Seal the jars immediately to preserve the freshness.
The recipe yields 2 jars, totaling 900ml of homemade raspberry jam.
Store the jars in a cool, dark place until ready to use.