Homemade Strawberry Jam

I bought a lot of strawberries from Cameron during the weekend trip. Besides eating them fresh, I used some of them to made strawberry jam.

I used:
12-13 big strawberries (cleaned and halved), smashed with a potato masher.
1/3 cup of castor sugar.

1. Pour the sugar into the smashed strawberries, mix it, then pour into a sauce pan.
2. Keep on stirring over medium heat.
3. Boil the mixture till it's slightly thicken (the mixture will get further thicken when it's cooled down).
4. Pour the mixture into a sterilized bottle (I re-use a preserved vegetable bottle and boiled it in hot water).
5. Close the bottle tight, place it in the fridge after the jam is slightly cooled down.