Begin by placing your chopped apples in a large mixing bowl. Add the sugar and lemon juice, mixing thoroughly to coat the apples. Cover the bowl with plastic wrap and refrigerate the mixture for at least 4 hours or overnight.

Before you start cooking, take a small plate and place it in the freezer. Ensure all your equipment is clean and ready to go.

Once the apples have macerated, remove the bowl from the refrigerator. Carefully strain the mixture using a colander, reserving the liquid.

In a saucepan, bring the reserved liquid to a boil over medium-high heat. Once boiling, add the strained apple pieces and stir well. Reduce heat slightly and maintain a robust simmer for 20 to 30 minutes.

After cooking, retrieve the small plate from the freezer. Spoon a small amount of the bubbling jam onto it and return it to the freezer for one minute. Test the consistency.

Once your jam has reached the perfect texture, fill sterilized jars with the hot mixture, leaving about 1/4-inch of headspace. Secure the lids tightly and process the jars in a boiling water bath for 10 minutes.