Boil ramen noodles for 2–3 minutes until just tender. Drain and set aside.
Heat oil in a large skillet over medium-high heat. Add carrots and cook 2–3 minutes.
Add red onion and cook 1 minute. Stir in cabbage and cook 2–3 minutes until slightly wilted but still bright.
Push veggies to the side. Pour eggs into the empty side of the skillet and scramble until just set.
Add drained ramen noodles to the skillet. Pour in the sauce and toss everything together until well coated and heated through, 1–2 minutes. Add a splash of water if it looks dry.
Taste and adjust with more soy sauce or a drizzle of sesame oil if you want.
Notes
Use fresh cabbage for crunch, or substitute with romaine for a lighter texture.
Adjust the sauce thickness with water if needed.
For extra flavor, add minced garlic or chili flakes.