1. Heat sesame oil in a skillet

2. Put sijimi in the skillet and add yakiniku sauce.

3. Cover with a lid and cook over high heat for 1 minute. When it begins to vapor, remove the lid and make sure all the shells are open. Put off the heat and arrange on plate.

For how long you should cook with your microwave oven, see Cooking Time vs Wattage Conversion.
For more tips of using Microwave Oven, see Sachiko's Guideline to Microwave Cooking.