In a large bowl, combine the cooked brown rice, shredded rotisserie chicken, steamed broccoli, sliced bell peppers, and shredded carrots.
In a small bowl, whisk together the sweet chili sauce, soy sauce, and sesame oil until well combined.
Pour the sauce over the chicken and vegetable mixture, tossing gently to coat everything evenly.
Divide the mixture into serving bowls.
Top each bowl with sliced green onions and sprinkle with sesame seeds if desired.
Serve immediately or chill in the refrigerator for 30 minutes for a refreshing cold bowl.