Preheat the oven to 450 degrees. Line a baking sheet with parchment paper.
In a bowl, mix together the flour, garlic powder, smoked paprika, salt, and pepper. Add the chicken pieces and toss until they are evenly coated.
Place the coated chicken pieces on the prepared baking sheet. Spray the chicken well with avocado oil spray.
Bake for 10 minutes, then flip the chicken and bake for another 10-15 minutes, or until the chicken is crispy and cooked through. If you notice any dry white spots from the flour while it bakes, spray those areas with a little more oil.
While the chicken bakes, chop the red bell pepper and broccoli. Mince the garlic and ginger.
Heat a skillet over medium-high heat and add a little avocado oil. Add the red bell pepper and broccoli and sauté until softened and fragrant. Add ginger and garlic, sautee for a minute or two, being careful not to burn. Remove the vegetables from the skillet and set aside.
Depending on your pan, add a little more oil if needed. Add the brown sugar, orange juice, soy sauce, orange zest, rice wine vinegar, sesame oil, minced ginger, and minced garlic to the skillet. Stir and simmer until everything is combined and the brown sugar has dissolved, about 5-10 minutes.
In a small bowl, stir together the cornstarch and water to make a slurry. Pour the slurry into the sauce, stirring constantly so it does not clump.
Bring the sauce to a boil, then let it simmer for at least 2 minutes, stirring often, until thickened and glossy.
Add the baked chicken and sautéed vegetables back into the skillet with the orange sauce. Toss everything together until the chicken and veggies are coated.
Serve warm over rice or with your favorite side.