1. Prepare pasta according to package directions; drain.
2. In a non-stick skillet, saute the flank steak over high heat.
3. If it begins to stick, add a little soy sauce, one tablespoon at a time.
4. When the steak is cooked through, reduce the heat to medium-low and add the soy sauce, red bell pepper, carrots and scallions.
5. Increase heat to medium-high and cook three minutes.