Make this vanilla-scented applesauce to serve alongside our Potato Rosti.
Combine all ingredients in a wide, heavy saucepan over medium heat. Cook, covered, stirring occasionally with a wooden spoon and adding more cider as needed to prevent scorching, until apples have broken down, 50 to 60 minutes. Mash any large pieces with the spoon. Add more sugar and spices, as desired.
Remove from heat; discard cinnamon and vanilla pod. Serve warm or at room temperature with rosti potatoes.
Refrigerate in an airtight container up to three days.