2 pounds strawberries, hulled
4 cups sugar (less if your berries are really sweet)
1/4 cup lemon juice
Stir all in a LARGE pot over low heat until sugar dissolves (jam can really splatter, so keep hot pads handy to stir and make sure it's a deep pot). Once sugar dissolves, raise heat to high and stir frequently until the jam has reached 220 degrees. If it seems to be taking a while, you can always take a spoon which you thought to stick in the freezer before starting your jam (!), stick it in the jam, pull it out, and see how the jam cools/sets on the spoon. Alternately, stick a plate in the freezer before starting your jam. Spread some jam on the plate. If you can draw a line through it and it starts to run back together, it's done.
Makes ? pints--I can't remember!