Step 2

Dissolve the brown sugar in the rice vinegar. Thinly slice the whites and light green parts of the onions (reserve the greens to use as garnish). Add them to the vinegar and sugar, add the garlic, soy sauce, vegetable oil and mix everything.

Step 5

In a non-reactive container or plastic bag thoroughly coat the sirloin tip steak with marinade. Place in the refrigerator and let marinate for 6 hrs or up to 24 hrs (with this beef cut longer is better).

Step 8

When ready to cook, bring the steak to room temperature. Scrape off the marinade and discard, lightly season with salt and pepper.

Step 11

Heat a grilling pan or cast iron skillet over medium-high for about 2-3 minutes. Add a bit of cooking oil and sear the thin sliced sirloin tip steaks for about 1-2 minutes per side, depending on how large their surface. Alternatively, heat your grill to medium-high and cook for 1-2 minutes on each side.

Step 14

Rest the seared steaks loosely covered with foil to keep warm, about 4-5 minutes. Cut against the grain for a more tender bite of beef. Serve spinkled with sesame seeds and the reserved green onion (sliced small and on the diagonal).