Finely shred the green and red cabbage and set them aside. Add the oil to the cast-iron skillet and place it over high heat. Once the oil is smoking hot, add the shredded cabbage and let it caramelize for 3-4 minutes without stirring.
Step 2
Meanwhile, slice the red bell pepper, mince the garlic and grate the ginger. Stir the cabbage, then add the garlic, ginger, and pepper. Cook for 2-3 minutes, stirring regularly.
Step 3
Add the soy sauce, rice vinegar, and granulated erythritol. Stir and let the veggies cook for 2 more minutes. Take the pan off the heat.
Step 4
Taste the stir fry and adjust seasoning if needed. Slice the scallions and sprinkle them on top. Garnish with sesame seeds and serve immediately.