01 - Heat 2 tablespoons olive oil in a large skillet or wok over medium-high heat until shimmering.
02 - Add chicken strips to the hot pan. Cook for 5 to 6 minutes, stirring occasionally, until golden brown and cooked through. Transfer chicken to a plate and set aside.
03 - Add remaining 1 tablespoon olive oil to the pan. Add onion, bell pepper, and zucchini. Stir fry for 4 to 5 minutes until vegetables are just tender-crisp.
04 - Stir in minced garlic and dried oregano. Cook for 30 seconds until fragrant, being careful not to burn the garlic.
05 - Return chicken to the pan. Toss everything together for 1 to 2 minutes until heated through and well combined. Season with salt and pepper to taste.
06 - Transfer to serving plates and garnish with fresh parsley and lemon wedges if desired. Serve immediately while hot.