Heat oil over medium-high heat until shimmering, add a pinch of salt to the oil.
Carefully add the Chinese yam into the pan, sauté a few minutes on each side until browned and cooked through.
Pour soy sauce onto the yam slices and continue cooking another 30 seconds.
Transfer to a small plate, sprinkle on top roasted sesame seeds to serve.
Notes
Use a kitchen glove to handle or washing your hand immediately after dealing with Chinese yam. When cooked through, the Chinese yam will turn slightly translucent.