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. Allow to marinate for at least 15 minutes at room temperature, or refrigerate overnight for deeper flavor penetration.
02 - Rinse the jasmine rice under cold running water until the water runs clear to remove excess starch. Transfer the rinsed 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 before fluffing gently with a fork.
03 - Heat a large skillet or grill pan over medium-high heat until smoking slightly. Arrange the marinated beef slices in a single layer, working in batches if needed to avoid crowding the pan. Sear for 2 to 3 minutes per side until deeply caramelized and cooked through. Transfer the cooked beef to a plate and set aside.
04 - Divide the fluffy jasmine rice evenly among four serving bowls. Arrange the seared char siu beef over the rice alongside steamed broccoli florets, shredded carrots, cucumber slices, and sliced scallions. Sprinkle toasted sesame seeds over each bowl and finish with a drizzle of chili oil or sriracha if desired. Serve immediately.