With the bacon fat hot, add diced onions. Add the diced cabbage as you cut it. Size of your diced cabbage depends on your preference. Add red pepper flakes and stir and fry at high heat for about 7 minutes or until tender. Add ginger near the end of the fry to give a a little heat.
Turn off heat then add the soy sauce and sesame oil. stir to mix well and serve hot.