Wash and pat dry the strawberries and Raspberries and chop the strawberries into small pieces. Take a glass jar to store the cooked jam in it and make it completely dry either putting it in oven for few minutes or keep it in sunlight for few hours.

Take a non stick pan and keep it on low flame. Now add chopped strawberries, Raspberries and sugar to the pan and with the help of a masher slightly mash the fruits. Now raise the flame to medium and cook the jam until it reaches 1/2 of its quantity, stirring occasionally.

Squeeze the juice from the lemon and add it to the jam and cook the jam for few more minutes. Now lets check the jam if it is cooked properly. Take water in a clear bowl and add a drop of little jam in it. If it sets at the bottom without dissolving in water, the jam is cooked.

Switch off the flame and store it in the glass jar once its completely cooled.