1. Remove the seeds of the peppers and cut into 1cm stripes. Put into an ovenproof bowl.

2. Add the oil, cover with the edge-open wrap. Microwave on 600W for 3 minutes. (1 and half minutes on 1200W)

3. Remove the wrap. Add the yakiniku sauce and mix.

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.