Add the diced apples, cinnamon and orange juice to a small saucepan. Cook over medium-low heat for 8–10 minutes, stirring occasionally, until the apples are very soft.
Transfer the cooked apples to a high-speed blender. Add the soaked cashews, orange zest and maple syrup, if using. Blend until completely smooth and creamy, adding water a tablespoon at a time as needed to reach a thick, dip-like consistency.
Serve warm or slightly cooled with fresh apple slices or homemade oat crackers. Sprinkle with a little extra cinnamon before serving.