Whilst waiting for the water to boil, shred your cabbage using mandolin or simply a sharp knife. Some people use a cheese slicer to do this, and that works great.
Take the water off the heat and immerse your cabbage in it for 30 sec to a minute. Whilst the cabbage is being scalded, mix the oil and vinegar in a cup and season it well with the spices.
Drain the cabbage and put in a large bowl. This is where you will also add the sliced pickled red pepper if you choose.
Pour the dressing over the cabbage, mix well, and store in an airtight container at least an hour before serving.