Any type of spiralized vegetable will cook much quicker than regular noodles, so you're only going to sauté these sweet potato noodles for 2 minutes or so. I use high heat so that they will maintain their crunch but also become a little bit tender. Because this is a stir fry sweet potato noodles recipe, you'll want to use a large skillet on high heat or a wok so that your vegetables become tender-crisp. This will also help to thicken the sauce.