Wash and dice berries or fruit if necessary and place in a saucepan, along with the caster sugar.

On a medium heat, bring the berries or fruit to a simmer. Stirring regularly.

Reduce the heat and allow to simmer for a further 10-15 minutes or until berries or fruit have started to break down and thicken. Depending on the consistency you're after, you can leave to thicken longer, or remove for a runnier coulis.

Carefully check the flavour and sweetness of your coulis, adding a few drops of lemon juice if needed to balance out the flavour, or a little more sugar if too tart.

Allow to cool, then pour into an airtight container or jar and keep in the fridge for your next baking project or special occasion needing some extra berry flavour.