2Cut the chicken breast into 1-inch pieces and the red bell pepper into 1-inch pieces.
3Mix all chicken seasonings (cornstarch, baking powder, garlic powder, ginger powder, salt, and pepper) in a bowl and coat the chicken pieces.
4Arrange chicken and peppers on baking sheets sprayed with oil and bake for 7-10 minutes, flip, spray again, and bake for an additional 7-10 minutes until golden and cooked through.
5Combine all sauce ingredients (soy sauce, hoisin sauce, brown sugar, minced ginger, red pepper flakes, and cornstarch slurry) in a saucepan and simmer on medium heat until thickened.
6Toss the baked chicken and peppers with the warm sauce.
7Divide into 4 even portions and serve over rice. Garnish with green onions.