Peel, core, and cut the apples into a 1/4 to 1/2 inch dice.
Transfer the diced apples to a large bowl, sprinkle with the sugar and bottled lemon juice, and gently toss to coat the fruit evenly.
Cover the bowl and refrigerate overnight, up to 24 hours (4 hours minimum), so the fruit can macerate.
Prepare a water bath canner, jars, and lids.
Strain the macerated apples through a large fine mesh sieve set over a jam pot, reserving the fruit and capturing all the juices in the pot.
Bring the reserved juices to a hard boil, then carefully add the drained apple pieces.
Cook over medium high heat, stirring occasionally to prevent scorching, for 20 to 30 minutes, until the jam reaches the gel stage (220 degrees F at sea level, or until a spoonful wrinkles on a plate chilled in the freezer) or your preferred thickness.
Ladle the hot jam into prepared jars, leaving 1/4 inch headspace. The jam is thick, so de-bubble with a spatula or chopstick, top up the headspace as needed, wipe the rims, and apply two piece lids until fingertip tight.
Process in a boiling water bath canner for 10 minutes, adjusting for altitude. Turn off the heat and let the jars rest in the canner for 5 minutes before removing.
Cool the jars on a towel lined counter for 12 to 24 h