Step 1

In a medium bowl, whisk together the soy sauce and cornstarch until no lumps remain. Whisk in the brown sugar, ginger, salt, and pepper.

Step 2

Warm 1 tablespoon of the oil in a large skillet over medium-high heat. Add half the sirloin; cook until well brown, about 3 minutes. Transfer to a bowl and repeat with the remaining sirloin.

Step 3

Add remaining 1 tablespoon of oil to the skillet. Add the onion and bell pepper. Cook, stirring until vegetables soften and are a bit charred, about 3 minutes.

Step 4

Add beef, and any accumulated juices, back to the skillet along with the cherry tomatoes and soy sauce mixture.

Step 5

Cook, stirring, until heated through and sauce is bubbly and thickened, but tomatoes still have form, about 3 minutes.

Step 6

Serve over hot cooked white rice, sprinkled with some diced scallions on top.