Peel and clean the apple, then chop finely with dates and lemon juice.

Pour all into a large casserole.

Gently wash the strawberries, clean and cut them in 4: mix them with the other ingredients and stir.

Put on fire, cover with the lid and cook the jam, stirring often, for 50 minutes.

Meanwhile prepare the sterilized jars: wash and dry them very well then heat them 1 minutes in the microwave.

Pour hot jam into jars, close well with the lids and turn upside down.

Finally, sterilize jars boiling them for 25 minutes in a pot completely covered with hot water.

Let cool jars in the water, drain and store in a cool place.