Preheat oven to 400˚F.
Cut the chicken into 1 inch bite-sized pieces. Add the sesame oil, cornstarch, salt, garlic powder, and paprika. Work the chicken until it is evenly coated with the mixture.
Spread chicken in a single layer on a large greased sheet pan. Add the broccoli, red pepper, and onion. Then sprinkle cashews over the top. Bake for 10 minutes.
While the chicken cooks, make the sauce by whisking together hoisin sauce, soy sauce, sriracha, brown sugar, garlic, and ginger.
Remove the sheet pan from the oven. Pour the sauce over the chicken and vegetables. Use tongs or a spatula to toss the chicken and veggies with the sauce.
Return the sheet pan to the oven for 4-6 more minutes, or until chicken is cooked through (165˚F internal temp.).
Garnish with your choice of sliced green onions and sesame seeds.
