Peel the apples, take out the heart and the seeds. Cut the apples about ½ inch thick. Transfer it to the instant pot.
Squeeze the lemon and add the juice to the apples, stir.
Add brown sugar, cinnamon, honey or maple syrup and nutmeg to apples. Stir in such a way that apples are covered.
In a medium bowl, mix the cornstarch with the water. Stir until lumps disappear and add the mixture to apples. Stir again.
Close the lid making sure the valve is closed. Turn on the instant pot in manual mode and cook for 6 minutes. Let the apples stand and do a natural release 10 minutes later.
Remove the lid and stir. You can serve immediately or let them cool in the refrigerator for a couple of hours. Both options are delicious.