01 - Whisk together soy sauce, brown sugar, sesame oil, rice vinegar, gochujang, garlic, ginger, and black pepper in a large bowl. Add chicken thighs and toss to coat thoroughly. Marinate for at least 15 minutes, or refrigerate overnight for maximum flavor absorption.
02 - Heat vegetable oil in a large grill pan or skillet over medium-high heat. Remove chicken from marinade, allowing excess to drip off. Cook chicken for 4-5 minutes per side until nicely charred and internal temperature reaches 165°F. Let rest for 5 minutes before slicing into strips.
03 - Divide cooked rice evenly among four bowls. Arrange sliced chicken, shredded carrots, cucumber slices, purple cabbage, and green onions on top of the rice. Sprinkle with sesame seeds for added crunch and nutty flavor.
04 - Top bowls with optional garnishes such as kimchi, additional gochujang, fresh lime wedges, or cilantro leaves. Serve immediately while chicken is still warm and vegetables remain crisp.