Remove flowerets from broccoli; separate into bite-size pieces. Peel stalks; cut crosswise into 1/4-inch slices. Place in enough boiling water to cover for 2 minutes. Drain; cool on several layers of paper towels. Combine stir-fry sauce and sesame oil; set aside. Heat vegetable oil in hot wok or large skillet over medium-high heat. Add broccoli and ginger; stir-fry 3 minutes. Add stir-fry sauce mixture; cook, stirring, until broccoli is coated with sauce. Turn onto serving platter and sprinkle sesame seed evenly over broccoli.