Equipment and preparation: You will need three clean 300ml/10fl oz jars with lids. If making raspberry jam, it's crucial to use sterilised jars to store it. To clean the jars, preheat the oven to ...
Prep time: 5 minutes, plus overnight chilling 4 Divide the oats between 4 glass jars, each with a volume of at least 300ml. Stir in the ... Put the lids on and refrigerate for up to two days.