Fruits of our labour

My kind of raspberry jam. (Freezer Jam no boiling involved)
2.5lbs of raspberrys.
4lbs of sugar.
4 tablespoons of lemon juice.
stir the magic ingrediants.
leave standing in a warm room and stir periodically throughout the day.
before going to bed add a whole bottle of certo and stir. leave for 24hours.
then put into tupperware containers and then into the freezer.
thaw out to eat.