Preheat your oven to 425 degrees.
Core apples and peel if you don't own a food mill.
Add the apples to a large oven safe vessel.
Pour in a tiny amount of water to keep the apples from burning on the bottom before they start to soften. Use no more than a ¼ cup water. You just want to barely cover the bottom of your cooking vessel.
Add whole cinnamon sticks, ginger, or ground spices (optional)
Roast for 30 to 45 minutes until apples are soft. The apple should be easily smashed with the back of a spoon.
Run through a food mill to smooth. You could also use a food processor if you like.
Serve warm or refrigerate for up to 5 days.