Marinate the Pork: In a bowl, toss the sliced pork tenderloin with 1 tbsp of soy sauce and a pinch of salt and pepper. Let it marinate for about 5-10 minutes if time permits.

Cook the Pork: In a large skillet or wok, heat 1/2 tbsp of sesame oil over medium-high heat. Add the pork and stir-fry for 3-4 minutes until browned and cooked through. Remove the pork from the skillet and set aside.

Stir-Fry the Vegetables: In the same skillet, add the remaining 1/2 tbsp oil. Add the garlic and ginger, if using, and cook for about 30 seconds until fragrant. Add the cabbage, bell pepper, and carrots. Stir-fry for 4-5 minutes until the vegetables are tender-crisp.

Combine Ingredients: Return the pork to the skillet and add the remaining 1 tbsp soy sauce. Stir everything together and cook for an additional 2-3 minutes, allowing the flavors to meld. Season with salt and pepper if desired.

Serve: Divide the stir-fry among four plates and garnish with sliced green onions, if using.