Step 1

Prepare Steak: If moist, pat steak dry using paper towels. Thinly slice against grain into 1/4 inch thick strips (Note 5), and toss with corn starch in large bowl until well coated. Set aside.

Step 2

Prepare Shrimp: Peel and remove veins from shrimp. If moist, pat dry with paper towels. Set aside.

Step 3

Make Sauce: Add all sauce ingredients to small saucepan. Occasionally stirring, bring to simmer over medium-low heat, about 5 minutes. Once simmering, reduce to low heat to keep sauce warm; meanwhile, proceed to next step.

Step 4

Cook Steak: Heat oil in large wide pan (Note over medium heat for a few minutes or until hot. Add sliced beef to hot pan and cook until mostly browned, a few minutes, stirring frequently. Transfer to plate.

Step 5

Cook Shrimp: Add shrimp to now-empty pan in single layer. Cook until turning pink around edges, then flip and cook for another minute or until cooked through.

Step 6

Finish & Serve: Return beef to pan and pour sauce on top. Stir for a minute to let beef and shrimp soak up sauce. Turn off heat. Stir in scallions and serve immediately (Note 7).