Preheat oven to 400F and line baking sheet with parchment paper.
Dice chicken and all veggies into around 1 inch cubes. Add all to a large bowl.
In a glass measuring cup, whisk together soy sauce, ketchup, honey, pineapple juice, rice vinegar, garlic, ginger, and red pepper flake. Whisk in arrowroot powder.
Pour over chicken and veggies and toss until fully coated.
Pour onto baking sheet and spread out evenly. Bake for 10 minutes and then add pineapple chunks over top, tossing to coat with chicken mixture and sauce. Bake for another 15 minutes.
Broil for last 3-4 minutes for crispier topping. Serve over rice. There will be extra saucy liquid but save this to add on top of rice and to keep the chicken juicy!