Begin by cutting the chicken breasts into bite-sized pieces. Season with salt, pepper, and garlic powder.
Heat vegetable oil in a large skillet over medium-high heat. Add the chicken pieces and cook for about 6-8 minutes, or until golden brown and cooked through. Remove from heat and set aside.
In a small bowl, whisk together mayonnaise, sweet chili sauce, sriracha, soy sauce, and rice vinegar until smooth. Adjust the spice level by adding more sriracha if desired.
In serving bowls, layer the cooked jasmine rice, followed by the cooked chicken, shredded cabbage, shredded carrots, and sliced cucumbers.
Drizzle the bang bang sauce over the top of each bowl and sprinkle with chopped green onions and sesame seeds if using.
Serve immediately and enjoy your flavorful Bang Bang Chicken Bowl!