Brown the peppers: Heat a large skillet or wok over medium-high heat. Add a small splash of water or drizzle of oil. Add the bell peppers and cook for about 3 minutes, or until browned, stirring occasionally.
Bloom the aromatics: Push the peppers to the sides of the pan to create space in the center. Add the garlic, ginger, and white parts of the green onions to the hot spot. Cook for about 30 seconds, or until fragrant.
Mix the sauce: Whisk the cold water or broth with the cornstarch until smooth. Then whisk in the tamari, rice vinegar, and date syrup.
Add cabbage. Add the cabbage noodles on top but do not stir. Stir the sauce again right before pouring it over the top. Cover and let it wilt cook for 2 minutes, so the cabbage wilts and loses volume. Cook just until the cabbage is wilted but still slightly crisp, then remove from heat. Overcooking will make it soft and watery instead of tender-crisp.
Uncover and toss everything together. Cook, stirring, for about 60 seconds or until the sauce thickens and coats the vegetables. Adjust the seasonings to taste.
Finish and serve: Remove from the heat. Top with sesame seeds and the green parts of the onions.
Notes
Add a protein: Serve with my one-pan Easy Tofu Crumbles for extra protein.