Higher temp option: If you choose this option, please use a silicone baking sheet and not parchment paper or the pastila will stick. If you want to get your egg whites to a higher temperature, preheat the oven to 350°F. After making your apple mixture (through step 3 above), bake at 350°F for 10 minutes, then reduce heat to 200°F and continue to let them dry out for 3 hours. Leave in the oven (turned off) several hours (or overnight) to cool.
Flavoring options: In lieu of almond extract, you can use a little vanilla extract, cinnamon or your own mix of spices and extracts that go well with apple.