Strawberry Jam

Ingredients
2 envelopes Knox unflavored gelatine
1 cup cold water
2 pints strawberries sliced, or blueberries (about 4 1/2 cups)
1/2 cup sugar
1/4 cup lemon juice

Directions
In a large saucepan sprinkle gelatine over cold water and let stand 1
minute. Stir over low heat until gelatine is completely dissolved,
about 5 minutes. Add berries, sugar, and lemon juice. Bring to a
boil, then simmer, stirring occationally and crushing berries slightly
for about 10 minutes. Spoon into jars, cool slightly before
refrigerating. Chill until set about 3 hours. Store up to 4 weeks in
fridge, up to 1 year in freezer.