Rinse jasmine rice under cold water until the water runs clear. Cook the rice in beef broth according to package instructions and set aside.
In a bowl, combine the sliced flank steak, soy sauce, chili paste, and cornstarch. Mix well and let it marinate for at least 15 minutes.
Heat vegetable oil in a large skillet or wok over medium-high heat. Once hot, add the marinated beef in batches to avoid overcrowding. Fry until the beef is crispy and browned on the edges, about 3-4 minutes. Remove the beef from the pan and set aside.
In the same skillet, add a tablespoon of sesame oil. Stir-fry the onion, garlic, ginger, and bell peppers for about 3-4 minutes until they are tender but still crisp. Season with a pinch of salt and pepper.
Return the crispy beef to the skillet with the sautéed vegetables. Stir everything together and cook for an additional 2 minutes, ensuring everything is well coated with flavors.
In a bowl, place a generous serving of the beef and vegetable mixture over the jasmine rice. Garnish with chopped green onions and sesame seeds for added flavor and crunch.