Season the chicken with salt and pepper and set aside.

In a skillet, heat the olive oil over medium heat and sear the chicken on both sides just until lightly browned. This step adds flavor, but you can skip it if you prefer to go straight to the slow cooker.

Place the chicken in the slow cooker. Add minced garlic, chicken broth, heavy cream, Parmesan cheese, and Italian seasoning. Stir briefly to combine.

Cover and cook on low for 4 to 6 hours or on high for 2 to 3 hours, until the chicken is cooked through and tender.

If you want a thicker sauce, transfer the sauce to a small saucepan and simmer over medium heat until it reduces to your liking, then return it to the slow cooker.

Taste and adjust salt and pepper as needed. Sprinkle with chopped parsley before serving.