Heat a nonstick skillet over medium heat and add the olive oil.
Sauté the red onion and garlic for 1-2 minutes, until fragrant.
Add the zucchini and orange pepper. Cook for 5 minutes, until the vegetables are tender but crispy.
Stir in the cooked chicken, smoked paprika, oregano, salt, and pepper. Cook for another 3 minutes until heated through.
Sprinkle reduced-fat cheese on top, cover, and let it melt for 1-2 minutes.
Garnish with fresh parsley and serve.