Begin by peeling, coring, and slicing the Granny Smith apples into thin wedges. Toss these apple slices in a bowl with lemon juice, ensuring they are well coated to prevent browning.

In a separate bowl, mix the sliced apples with brown sugar and the warm, fragrant cinnamon. If you're using nutmeg, add it now.

Transfer the apple mixture into the Instant Pot, ensuring it is evenly distributed. Seal the lid tightly and select the high-pressure cook setting. Set the timer for 1 minute.

Once the cooking time is complete, perform a quick release of the pressure by turning the valve to venting. Carefully open the lid and check the apples for tenderness.

Serve your Instant Pot Cinnamon Apples warm in bowls, or store them in an airtight container in the refrigerator for up to 5 days.