The steps indicate:

1. Slice First: After trimming the steak, you slice it against the grain into 1/4-inch thick strips.

2. Marinate: You place those pre-sliced strips into a container and pour the marinade over them, refrigerating for 1 to 4 hours.

3. Grill: Once marinated and patted dry, the strips are added directly to a high-heat surface (like a flat-top or cast iron pan) and tossed with a spatula for about 5 minutes.

This method allows the marinade to coat more surface area of the meat and ensures the strips cook very quickly over high heat.