In a large pot of boiling water, add Yaki-Soba until loosened, about 1-2 minutes; drain well.
In a small bowl, whisk together soy sauce, garlic, brown sugar, ginger and white pepper; set aside.
Heat olive oil in a large cast iron skillet over medium high heat. Add onion and celery, and cook, stirring often, until tender, about 3-4 minutes. Stir in cabbage until heated through, about 1 minute.
Stir in Yaki-Soba and soy sauce mixture until well combined, about 2 minutes.
Serve immediately.
Notes
*Yaki-Soba is ramen-style noodles and can be found in the refrigerated aisle of your local grocery store.