While oven-baked Cajun fries are best enjoyed straight out of the oven for maximum crispiness, you can store leftovers for later. Allow the fries to cool completely at room temperature before storing them. Transfer them to an airtight container and place it in the fridge for 2-3 days. When you are ready to enjoy them, preheat your oven to a high temperature, around 220-230°C (425-450°F). Arrange the fries in a single layer on a baking sheet lined with parchment paper. Bake for a few minutes until they are heated through and regain some of their crispiness. While the reheated fries may not be as crispy as when freshly baked, they can still be enjoyable.