Peel and core Red Apple (1 kilogram) and cut into cubes.
Place apple cubes into a large pot and add Lemon Juice (2 1/2 tablespoon), Lemon (to taste), Apple Juice (225 gram), Granulated Sugar (200 gram), and Ground Cinnamon (1 teaspoon). Cook apple mixture for about 10 minutes over high heat.
Turn to medium heat and continue to boil for another 20 minutes until apples are translucent, soft and liquid reduced to half and thick. Stirring occasionally to prevent burning.
Lastly simmer at low heat for about 5-10 minutes and use a large spoon or wooden spoon to mash the apples.
Ladle hot jam into sterilized bottles and tightly sealed by inverting them to cool. Then place them in the refrigerator for at least 2 days before consuming. Serve and enjoy!