Baking soda helps create a rough exterior texture for crispiness.
Shaking the potatoes after draining roughs up the surface for crispiness.
Steaming the potatoes in the colander removes moisture, which is crucial for crispiness, so do not skip this step.
Allow the oiled baking dish to preheat in the oven and sit for an additional 10 minutes to reach the correct temperature (oil should be sizzling when potatoes are added).
Flipping the potatoes every 10 to 15 minutes ensures even crispness.