Pat the steak cubes dry with paper towels and season with salt and pepper.
In a small mixing bowl, whisk together the soy sauce, honey, sriracha, rice vinegar, and red pepper flakes.
Heat the olive oil in a large skillet or cast-iron pan over high heat until it begins to smoke slightly.
Add the steak cubes in a single layer, ensuring not to overcrowd the pan; sear for 2 minutes per side to develop a dark crust.
Reduce the heat to medium and stir in the minced garlic, cooking for 30 seconds until fragrant.
Pour the prepared sauce over the steak bites and stir to coat evenly.
Simmer for 2 to 3 minutes until the sauce reduces to a thick glaze that clings to the meat.
Remove from heat and garnish with toasted sesame seeds and sliced green onions.