2 pounds fresh strawberries, hulled
4 cups white sugar
1/4 cup lemon juice
In a wide bowl, crush strawberries in batches until you have 4 cups of mashed berry. In a heavy bottomed saucepan, mix together the strawberries, sugar, and lemon juice. Stir over low heat until the sugar is dissolved. Increase heat to high, and bring the mixture to a full rolling boil.
Boil, stirring often, until the mixture reaches 220 degrees F (105 degrees C).
Transfer to hot sterile jars, leaving 1/4 to 1/2 inch headspace, and seal. Process in a water bath.
If the jam is going to be eaten right away, don't bother with processing, and just refrigerate.