Step-by-Step Instructions for Blueberry Raspberry Freezer Jam Clean your jars and lids with hot soapy water. Rinse clean. Rinse the berries and remove any stems or leaves. Zest lemon to get 1 Tbsp ...
Pre-heat oven to 180C/350F/Gas 4. Lightly grease a 29cm/11½in pie tin. For the blueberry jam, place the blueberries, apple juice, sugar, vanilla and cinnamon into a saucepan and bring to the boil.