Quarter the apples and pears, remove the cores. Cut the fruit into segments and place in a pan. Pour in the lemon juice and apple juice. Stir in the gelling agent, add the cinnamon stick. Bring to the boil while stirring, boil for approx. 1 min., stirring constantly. Add the sugar, continue to boil for approx. 5 mins. on a medium heat, stirring constantly.
While still boiling hot, ladle the jam into the clean, pre-warmed jars, fill the jars to just below the rim, seal immediately. Briefly upend the jars with screw-top lids, leave to cool on an insulating surface.
Test if the jam has set: Hold the ladle up high, if the third or fourth drop remains attached, the jam has reached the right consistency.
While still boiling hot, ladle the jam into the clean, pre-warmed jars, fill the jars to just below the rim, seal immediately.
Tip: Use a funnel with a wide neck to fill the jars.
Jars with screw-top lids should be upended briefly (approx. 1 min.), thus killing any bacteria or mould. Turn the jars the right way up and leave to cool on an insulating surface. Do not upend jars that are sealed with cellophane and a rubber band.