Thinly slice the onion. Cut the green pepper and red pepper into thin strips. Cut the cabbage into large pieces.
Heat the oil in a large pan and stir fry the bacon until it is cooked through. Put the onion, cabbage, green pepper and red pepper in order, stir fry them.
Add [A] to season and stir fry all together well. Put evenly the soy sauce and toss to combine.