Slice the chicken breasts into thin pieces so they cook faster and evenly. Season both sides with salt, black pepper, and Italian seasoning.
Heat olive oil in a large pan over medium heat. Add the chicken pieces and cook for 4–5 minutes on each side until golden brown and fully cooked. Remove the chicken from the pan and set aside.
In the same pan, add butter and minced garlic. Stir for about 30 seconds until the garlic smells fragrant.
Pour in the chicken broth and gently stir to combine all the flavors from the pan.
Add the heavy cream and mix well. Let it cook for 2–3 minutes on low heat.
Slowly add the grated parmesan cheese while stirring continuously until the sauce becomes smooth and creamy.
Return the cooked chicken to the pan and coat it with the creamy parmesan sauce.
Cook everything together for another 2–3 minutes until the sauce thickens slightly.
Turn off the heat and sprinkle fresh parsley on top before serving.