Place steak on a broiler pan coated with cooking spray. Broil 6 minutes. Turn steak over; brush with remaining hoisin mixture. Broil 6 minutes or until desired degree of doneness.
Place steak on a cutting board; let stand 5 minutes.
Combine cucumber and remaining ingredients in a bowl; toss to combine.
Cut steak diagonally across grain into thin slices.
Serve with cucumber salad.
Spiced wonton chips: Thaw 8 wonton wrappers, if frozen.
Cut wrappers in half diagonally; brush tops of wrappers evenly with 2 teaspoons dark sesame oil.
Combine 1/4 teaspoon Chinese five-spice powder and 1/8 teaspoon salt in a small bowl.
Sprinkle wrappers evenly with five-spice powder mixture.