Peel apples. Use apple corer to slice apples. Once the apples are sliced slice the apples lengthwise again. 

Place apples into the instant pot. Add in brown sugar and cinnamon. Stir well. 

Whisk together cornstarch and water. Pour into the pot and stir well. Place lid onto the pot and set valve to sealed position. 

Select button pressure cook/ manual/ high pressure (depending on the button you have on your pot) and then set timer for 1 minute. When instant pot is done pressurizing and the timer stops counting and beeps release pressure from the instant pot.

Let cool some and serve. Great with ice cream or just as a side dish.