In a heavy bottom pot or dutch oven, heat 1 teaspoon olive oil. Add the ground meat, onion and salt, and saute over medium-high heat, stirring, breaking the meat apart, stirring about 6 minutes.
Lower heat to medium, add the garlic, ginger, chili flakes and pepper and saute for 2-3 minutes.
Add the bell pepper, celery and cabbage, saute for just a few more minutes, then add the broth. Bring to a simmer, cover the pot, lower heat and simmer for 10 minutes or until cabbage has softened.
Season: Add the vinegar, soy sauce and sesame oil. Give a stir and taste. It should taste deep and tangy. If not add little more soy or vinegar to taste. Add a little sriracha or garlic chili paste to taste (or add more chili flakes) and stir in the scallions.*If the broth becomes too salty add a little splash of water to dilute.