Step 1

In a medium bowl mix together soy sauce, rice vinegar, ginger, garlic, Sriracha, sugar, sesame oil, and white part of scallions. Whisk together until well blended.

Step 2

Add steak to marinade covering both sides of steak. Marinade for 6 hours prior to grilling in the refrigerator. Skirt steak will be more tender the longer it's marinated. Overnight is great but, no longer than 24 hours.

Step 3

Heat a grill or grill pan to medium-high. Remove steak from marinade and reserve about ¼ cup of marinade.

Step 4

Oil the grill rack, then grill steak for 5 minutes on the first side. Flip over and cook for additional 5 minutes on the other side. Grill for 10 minutes total.

Step 5

Transfer steak to cutting board or platter and let rest for 5-10 minutes. Thinly slice across the grain.

Step 6

While steak is resting heat ¼ cup of leftover marinade either on the stovetop or in the microwave. Be sure to bring it to a boil.

Step 7

Drizzle heated marinade over the top of sliced steak. Sprinkle with toasted sesame seeds and green part of scallions for garnish and serve.