Cut the chicken into 1-inch pieces and season with salt and pepper.
In a small bowl, mix together garlic powder, onion powder, paprika, thyme, rosemary, and chili powder.
Sprinkle half the seasoning mixture over the chicken and toss with 1/2 tablespoon olive oil until evenly coated.
Heat 1 tablespoon olive oil in a large 12-inch skillet over medium-high heat.
Add chicken and cook for 6 to 8 minutes, stirring occasionally, until browned and cooked through.
Remove chicken and set aside on a plate.
Add remaining 1/2 tablespoon olive oil to the skillet.
Add onion and cook for 2 minutes until softened.
Stir in broccoli, zucchini, and bell peppers.
Sprinkle with remaining seasoning and cook for about 5 minutes, stirring occasionally, until crisp-tender.
Pour in chicken broth and scrape any browned bits from the pan.
Return chicken and any juices to the skillet and stir for 1 more minute.
Remove from heat, garnish with parsley if desired, and serve hot over rice, quinoa, or as is.