Use either Raspberries, Strawberries or mixed Forest Fruits (Frozen)
170g as above
80g sugar - might need less or more according to the fruit
1 tbsp water
Mix the cornflour and water to a paste.
Thaw the frozen fruit, add the sugar and gently heat until simmering.
Add the cornflour/water mixture, boil for one minute whilst stirring constantly.
Pour into clean, hot jars and seal.
Use instead of jam to sandwich your cake layers - gives a much fresher fruit taste.