This is a recipe for apple pie that uses only three ingredients, is egg- and butter-free, and can be easily made in a toaster oven without using a regular oven. Slice the apples (with the skin on) to an even thickness, mix with sugar, and heat in the microwave. Line a heat-resistant container with thinly rolled-out frozen pie crust, arrange the apples on top, and cover with pieces of pie crust cut into a lattice pattern. Cover with aluminum foil to prevent the surface from burning and bake in a toaster oven to create a delicious apple pie with a crispy on the outside and a gooey on the inside. The key points are how you slice the apples to prevent uneven heating and using aluminum foil to adjust the baking time.