Prepare the Instant Pot: Place a trivet in the Instant Pot and add 1 1/2 cups of water.

Prepare the Baking Pan: Spray a 7-by-2-inch baking pan with nonstick cooking oil and add the apple pie filling.

Cake Ingredients: In a large bowl, combine the flour, sugar, baking powder, cinnamon, salt, and nutmeg. Blend well with a whisk or spoon and spread the dry mixture evenly over the apples.
Top with the butter, taking care to cover the dry mixture as thoroughly as possible.
Loosely cover the pan with foil and place it in a sling.* Lower the pan onto the trivet.

Pressure Cook: Secure the lid and ensure the knob is turned to the sealing position. Choose the pressure cook/manual button, high pressure, and set the timer for 40 minutes.
Cool: When the time is up, remove the pan to a rack and remove the foil. Let the dump cake stand for about 10 minutes.

Serve: Serve the apple cake with a big scoop of ice cream or whipped topping and sprinkle with cinnamon sugar or a pinch of nutmeg.
