Slice the chicken into even strips and toss it in a bowl with Cajun seasoning, smoked paprika, salt, and black pepper. Let it marinate for 10 minutes.

Heat olive oil in a large skillet over medium-high heat. Add the chicken in a single layer and sear for 4–5 minutes per side until golden and cooked through. Remove and set aside.

In the same skillet, add more oil if needed. Add sliced bell peppers, onion, and garlic. Cook for about 5–7 minutes, stirring occasionally, until tender but still vibrant.

Return the chicken to the skillet with the veggies, squeeze over the lemon juice, and stir well to combine everything. Cook for another 2 minutes.

Garnish with chopped parsley and serve hot over rice, cauliflower rice, or in warm tortillas.