Place the chicken breasts in a single layer inside the crockpot.
In a mixing bowl, stir together the melted butter, minced garlic, chicken broth, Italian seasoning, salt, and black pepper.
Pour the butter mixture evenly over the chicken breasts.
Sprinkle half of the Parmesan cheese over the chicken.
Arrange the asparagus pieces around the chicken in the crockpot.
Cover and cook on low until the chicken reaches an internal temperature of 165°F and the asparagus is tender.
Sprinkle the remaining Parmesan cheese and the chopped parsley over the top before serving.