Toss chicken with spices, salt, pepper, olive oil, and lemon juice.
Heat a large skillet over medium-high heat.
Cook chicken, turning occasionally, until fully cooked and lightly browned with no pink inside (about 8–12 minutes total, depending on the thickness of your strips).
Cook the vegetables
In a large saucepan, heat olive oil over medium heat.
Add peppers and onion, sauté uncovered for 4–5 minutes.
Cover and cook 8–10 minutes more until softened to your liking.
Add garlic and cook 1 minute.
Combine and serve
Add cooked chicken to the vegetables and toss together.
Add a squeeze of fresh lemon or lime juice and mix.
Warm together for 2–3 minutes.
Serve with warm tortillas and toppings. Bon appétit.