Slice the steak into small thin pieces approximately 3/4" (2cm) square and 1/4" (5mm) thick.
Combine all the ingredients for the Marinade. Add the Marinade to the meat and mix well. Marinate for at least 1 hour.
Soak the wooden skewers in water for at least 30 minutes. Insert the meat through the wooden skewers.
Heat up the grill. Grill the meat for at least 2-3 minutes on each side, or until desired tenderness.
Garnish the Lemongrass Beef Skewers with bits of crushed peanuts and sautéed scallion before serving.
Notes
To make the sautéed scallion, heat up a non-stick pan with 2 teaspoons cooking oil. When the oil is hot, add in the 1/4 chopped scallions. Add salt to taste. Slightly sautéed for 1 minute.