Wear a glove then peel the skin of the yam. Hold your knife obliquely to cut larger cross-sections and cut the yam into thicker slices.
Add oil and place the yam slices in; continue frying over slow to middle fire until they are well seared. Keep tossing or moving them with any tools you prefer for an even heat.
Once seared, it takes about 6-7 minutes. Add light soy sauce, cumin powder, and chopped scallion.
