Wash, hull and roughly chop the berries. if you want very smooth jam you can chop the berries finely. I always chop them roughly and mash the berries here and there as the jam cooks. This yields a wonderful chunky jam.
Combine chopped berries and sugar in a heavy bottomed pan.
Mix well and add lemon juice. Start cooking in medium flame.
After 5-7 minutes, the sugar will dissolve and the mixture will froth a lot.
At this stage using a masher mash the berries here and there.
Continue to cook in medium flame for 15-20 more minutes or till the jam reduces well and leaves the sides of the pan.
Once the jam has considerably cooked and reduced, the color will turn dark.
At this stage bring out the plate from freezer and pour few drops of jam on it. If it sets well on cooing, the jam is done.
Let the jam cool thoroughly before storing in clean jar.
Store strawberry jam in refrigerator and use as required.