In a medium bowl, combine cubed chicken, cornstarch and wine; toss to coat. Cover with plastic wrap and transfer to the refrigerator for 1 hour.
In a deep skillet or wok over medium-high heat, add oil with ¼ tsp. red pepper flakes; toss to mix the ingredients.
When hot but not smoking, working in batches, add the marinated chicken. Cook the meat until lightly browned and no longer pink, about 3 to 3 ½ minutes.
Using a slotted spoon, transfer the cubes to a bowl; set aside. Add another ¼ tsp. red pepper flakes and cook the remaining chicken before transferring them to the bowl.
When the chicken is done, add onions and red peppers; sauté 4 minutes. Add ginger and garlic; sauté for 1 minute.
Return the chicken back to the skillet with any accumulated juices; stir again. Add brown sugar and stir-fry until the meat is caramelized, about 1 ½ minutes.
Pour in orange juice, soy sauce, and sambal oelek; sauté the ingredients for 30 seconds. Add the white parts from the green onions and stir to combine.
Serve over a bed of rice and garnish with the green parts of the green onions.