Fruits should be removed from their stems and placed in a big pot.

Crush the berries to release the juice as you heat it over medium heat.

Add the sugar and lemon juice once it comes to a boil.

Stir the mixture with a reduced heat setting until the sugar melts.

Before bottling and sealing the jam, bring it back to a boil for a few minutes.

It should last up to two years if stored in a cold, dark location.