Grilled Sesame Steak Skewers are simple and exploding with flavor. Sirloin steak soaks in a simple sesame ginger marinade for a few hours before threaded onto skewers with red onion and grilled until sticks and caramelized. Serves 4+ in 30 minutes.
Toss the steak in the white pepper and set off to the side.
In a large bowl, whisk together the garlic, ginger, brown sugar, oyster sauce, tamari, toasted sesame and olive oil and sesame seeds. Add in the cubed steak, cover and marinated for 3 to 4 hours.
Preheat your grill to 450℉ (or 230℃).
Thread the steak and onions onto metal skewers.
Pour the marinade into a skillet, heat on high and bring to a boil, cooking the sauce for 5 minutes. Make a slurry by mixing 1½ teaspoons of cornstarch with 1½ tablespoons cold water. Whisk the slurry into the sauce until it thickens. Remove the skillet off of the heat and measure out 1/2 of a cup. Reserve any remaining sauce for serving.
Place the skewers onto your preheated grill grates. Cover and grill for 6 to 8 minutes or until a grill marks form and the skewers easily release from the grill.
Turn the skewers and cook for an additional 4 minutes. Meanwhile, brush the tops (with the grill marks) with some of the measure out glaze. Turn and brush more of the glaze over the steak and onions. Repeat this a few times until the glaze caramelizes.
Remove the skewers from the grill and sprinkle with sliced green onions and cilantro, if desired. Serve remaining sauce on the side.