Preheat oven to 350. Place butter in a 13x9 pan and place it in the oven to melt.
In a shallow bowl, whisk together egg and lemon juice.
In a separate bowl, combine ranch mix, breadcrumbs and Parmesan cheese, mixing until evenly distributed.
Dip both sides of chicken in egg, then in breadcrumb mixture.
When butter is melted, remove pan from the oven. Flip each breast so both sides get covered in butter, then place chicken in pan, leaving room on one side for potatoes.
Cube 4 potatoes and add them to the pan, turning them so they are coated in butter. Sprinkle the breadcrumb mixture over them.
Bake for 45 minutes, or until center of chicken is no longer pink. To fancy it up, add a slice of provolone cheese during the last 5 minutes until melted around it.
Serve and enjoy!