01 - Lightly grease the inside of the slow cooker with 1 tablespoon of olive oil.
02 - Arrange the halved potatoes and sliced onion evenly on the bottom of the slow cooker.
03 - Combine minced garlic, Italian herbs, paprika, salt, pepper, and remaining 1 tablespoon olive oil in a small bowl. Rub this mixture over the chicken breasts on both sides.
04 - Place the seasoned chicken breasts on top of the potatoes and onions. Sprinkle the Parmesan cheese evenly over the chicken and potatoes.
05 - Pour in the heavy cream around the edges if using for a creamier result.
06 - Cover and cook on High for 4 hours or Low for 7 hours, until the chicken is cooked through and potatoes are fork-tender.
07 - Garnish with chopped parsley and extra Parmesan before serving.