Marinate like you mean it. In a large bowl, whisk together soy sauce, rice vinegar, gochujang, sesame oil, cornstarch, grated garlic, and honey until smooth. Add the sliced steak and toss to coat completely. Let this marinate for at least one hour, but overnight is even better. The longer it sits, the more flavor develops.
Get your pan screaming hot. Heat your cast iron pan or Blackstone over medium-high heat until it's properly hot. You want that sizzle when the steak hits the surface—that's what creates the caramelized edges.
Cook fast and furious. Remove the steak from the marinade (save any leftover marinade) and cook in batches to avoid overcrowding. Cook for 2-3 minutes per side until nicely caramelized but still tender. Don't move it around too much—let it develop that crust.
Assembly time. Start with a base of jasmine rice in each bowl. Top with the caramelized steak, roasted vegetables, cucumber slices, and a sprinkle of sesame seeds and green onion. Drizzle with sriracha mayo and any leftover marinade if you want extra flavor.
Enjoy immediately. This is best eaten right away while the steak is still warm and the rice is fluffy. The combination of hot steak, cool cucumber, and creamy sriracha mayo is what makes this bowl special.