For the crispiest fries, do not skip drying the zucchini thoroughly, and avoid overcrowding the rack so the fries bake rather than steam. If you need to bake in batches, keep cooked fries warm in a low oven while the rest finish baking. Leftover zucchini fries can be refrigerated in a container with the lid slightly ajar for up to 3 days and reheated in a 400°F oven or 375°F air fryer until hot and crisp again. To keep carbs low, choose dips made with healthy fats and without added sugars, such as homemade garlic aioli, spicy mayo, or a no-sugar-added marinara.