Slice each chicken breast in half horizontally to create thinner fillets (this helps them cook faster and stay tender). Season with Cajun seasoning, smoked paprika, salt, and pepper.
Spray a large frying pan with low-calorie cooking spray and set over medium-high heat. Add the chicken breasts and cook for 4–5 minutes on each side, or until golden and cooked through. Remove and set aside.
In the same pan, spray more cooking spray if needed. Add the onion and garlic, frying gently until softened (about 3–4 minutes).
Stir in the sun-dried tomatoes and cook for 2 minutes.
Pour in the chicken stock, stir well, and let simmer gently for 2–3 minutes.
Reduce the heat to low and stir in the light cream cheese, mixing until smooth and creamy.
Return the chicken breasts to the pan, coating them in the sauce. Simmer for a further 5 minutes, allowing the flavours to combine.
Garnish with fresh parsley and serve hot.