01 - In a mixing bowl, whisk together the hoisin sauce, soy sauce, honey, brown sugar, Shaoxing wine, oyster sauce, sesame oil, minced garlic, five-spice powder, and white pepper until well combined. Add the thinly sliced beef and toss thoroughly to coat every piece. Let marinate at room temperature for at least 15 minutes, or refrigerate overnight for deeper flavor penetration.
02 - Rinse the jasmine rice under cold running water until the water runs clear. Transfer the rice to a saucepan along with the water and salt. Bring to a rolling boil over medium-high heat, then reduce the heat to low, cover tightly, and simmer for 15 minutes. Remove from heat and let the rice rest, still covered, for 5 minutes. Fluff gently with a fork before serving.
03 - Heat a large skillet or grill pan over medium-high heat. Arrange the marinated beef slices in a single layer, working in batches to avoid overcrowding. Sear for 2 to 3 minutes per side until deeply caramelized and just cooked through. Transfer the seared beef to a plate and set aside.
04 - Divide the fluffy jasmine rice among four bowls. Layer each with the char siu beef, steamed broccoli florets, shredded carrots, cucumber slices, and finely sliced scallions. Sprinkle toasted sesame seeds over the top and finish with a drizzle of chili oil or sriracha if desired. Serve immediately.