Preheat your oven to 400°F and line a baking sheet with parchment paper.
Cut the chicken breast into small, bite-sized pieces and place them in a bowl.
Toss the chicken with half of the olive oil, half of the salt, half of the pepper, and half of the garlic powder.
Spread the chicken on the baking sheet and roast for 12 to 15 minutes until cooked through and slightly golden.
Place the air-popped popcorn into a large mixing bowl.
Drizzle the remaining olive oil over the popcorn and toss well to ensure even coating.
Sprinkle the parmesan cheese, nutritional yeast, dried oregano, and the remaining salt, pepper, and garlic powder over the popcorn.
Add the roasted chicken bites to the popcorn bowl and toss everything together gently.
Garnish with freshly chopped parsley and serve immediately while warm.