Trim the bottoms of the baby bok choy and separate the leaves. Cut the leaves in half to separate the leafy parts and stems. Cut the stems in half lengthwise.
Mix the potato starch and 1 teaspoon of the water in a small bowl to make a slurry. Set aside.
Heat the oil in a large skillet over medium heat. Add the baby bok choy and cook for 1 minute. Add