PLACE steak strips in medium bowl. Sprinkle with cornstarch; toss to coat. Add marmalade and ginger; stir until well blended.
HEAT oil in large nonstick skillet on medium-high heat. Add steak mixture; stir-fry 4 to 5 minutes or until steak is cooked through. Reduce heat to medium-low.
ADD broccoli, water chestnuts and soy sauce; mix well. Cover; simmer 5 minutes or until thickened, stirring frequently.
SERVE over rice; sprinkle with peanuts.