Prep everything then sauté the vegetables and throw in the cooked noodles...that's it! Note: Korean sweet potato noodles, also known as starch noodles or Korean vermicelli, are made from sweet potato starch and water. When cooked, these dried gray noodles turn clear. Do not confuse them with Korean “cold noodles”, which are made from buckwheat. Korean sweet potato noodles can be found in Asian or Korean markets. This recipe was featured as part of Chowhound's "Easy Weeknight Vegetarian Main Dishes".