In a large skillet over medium-high heat, add the ground beef. Cook until browned, breaking it apart with a spatula, about 5-7 minutes. Drain excess fat if necessary.
Lower the heat to medium and stir in the gochujang, soy sauce, sesame oil, brown sugar, garlic, and ginger. Mix well to coat the beef evenly. Allow it to simmer for another 2-3 minutes, so the flavors meld together.
In a separate pot or steamer, cook the broccoli, carrots, and bell peppers until just tender, about 3-5 minutes. You can also sauté them in a little sesame oil for added flavor.
To assemble the bowls, place a generous scoop of rice at the bottom of each serving bowl. Top with the spicy beef mixture and then add the sautéed vegetables.
Garnish with chopped green onions and sprinkle with sesame seeds for a nice crunch.
Notes
You can adjust the spice level by adding more or less gochujang.