Marinate the Steak: In a bowl, combine steak cubes with soy sauce, gochujang, honey, sesame oil, garlic powder, onion powder, salt, and pepper. Marinate for at least 30 minutes, or up to 2 hours.
Grill the Steak: Preheat grill to medium-high heat. Grill the steak cubes for 3-4 minutes per side, or until cooked to your desired doneness. Let rest for 5 minutes before serving.
Make the Creamy Sauce: In a small bowl, whisk together mayonnaise, sour cream, sriracha, salt, and pepper.
Assemble the Bowls: Divide cooked rice among bowls. Top with grilled steak and drizzle generously with the Creamy Sauce.
