Preheat oven to 325°F (163°C). Brush a baking sheet with a neutral oil (canola, veggie, avocado)
In a large bowl, stir the oats, coconut, almonds, cinnamon, ginger, nutmeg, and salt together until combined. Set aside.
In a medium bowl, stir together the sourdough discard, the maple syrup, brown sugar, and vanilla extract until smooth and combined. Pour over dry ingredients and mix until everything is moistened.
Spread mixture out onto prepared baking sheet and bake for 30-40 minutes, making sure to stir the granola every 10–15 minutes to prevent burning.
Allow granola to cool for 20 minutes on the baking sheets. Granola gets crunchier as it cools. Pour into a large bowl and stir in the dried golden raisins and crushed apple chips.
Cool completely. Then, cover tightly and store at room temperature for 1 to 2 weeks. Granola loses its crunch over time, and the dried apple chips in this one will slowly lose their crunch once exposed to humidity in the air.