Marinate the Steak: In a bowl, whisk together soy sauce, brown sugar, sesame oil, minced garlic, and grated ginger until combined. Place the flank steak in a zip-top bag or shallow dish, and pour the marinade over the steak, ensuring it's well-coated. Seal the bag or cover the dish, then let the steak marinate in the refrigerator for at least 30 minutes, or up to overnight for maximum flavor.

Cook the Rice: While the steak marinates, prepare the rice according to package instructions. Rinse the rice under cold water until the water runs clear, then add it to a pot with the appropriate amount of water or broth. Bring it to a boil, then reduce the heat to low, cover, and simmer for 15-20 minutes until fluffy. Remove from heat and let it sit covered for an additional 5 minutes before fluffing with a fork.

Prepare the Spicy Cream Sauce: In a separate bowl, combine sour cream, gochujang, honey, and lime juice. Whisk the mixture until it's smooth and well blended, adjusting the amount of gochujang based on your spice preference. Set the spicy cream sauce aside so the flavors meld together.

Chop the Vegetables: Select your favorite vegetables, such as bell peppers, broccoli, and carrots. Using a sharp knife, cut them into bite-sized pieces, aiming for uniformity to ensure even cooking. Set these vibrant vegetables aside on a cutting board or a plate, ready for sautéing alongside the flavorful steak.

Cook the Steak: Heat a large skillet over medium-high heat and add a drizzle of vegetable oil. Once hot, carefully place the marinated flank steak into the skillet and cook for about 4-5 minutes on each side for medium-rare. Adjust cooking time based on your preference for doneness.

Sauté the Vegetables: In the same skillet, after removing the cooked steak, add more vegetable oil if needed, and toss in the chopped vegetables. Sauté for 3-5 minutes, stirring frequently, until they are tender-crisp and vibrant in color.

Rest and Slice the Steak: Once cooked, transfer the steak to a cutting board and let it rest for at least 5 minutes. After resting, slice the steak against the grain into thin strips.

Assemble the Bowls: Start by placing a generous scoop of fluffy rice in individual bowls. Layer the sliced steak and sautéed vegetables on top.

Drizzle the Sauce: Take the spicy cream sauce you prepared earlier and generously drizzle it over the top of each assembled bowl.

Garnish and Serve: Sprinkle toasted sesame seeds and finely chopped green onions over each bowl as a garnish. Present the bowls to your family or guests, and savor the joy of sharing this delicious creation together!