Spray a 6 quart crockpot with non-stick cooking spray.
Season chicken pieces on all sides with 1/2 tsp salt, 1/4 tsp black pepper, 1/2 tsp garlic powder, 1/2 tsp onion powder, and 1/2 tsp smoked paprika.
Heat 2 TBS olive oil or other cooking oil in a large skillet over medium high heat until hot. Add in chicken in a single layer and cook on all sides until golden brown.NOTE: we are not cooking the chicken all the way through, just adding color and locking in flavor. Place seared chicken into prepared crockpot.
Add potatoes to same skillet. Season with 1/4 tsp each of salt, black pepper, garlic powder, onion, powder, and paprika. Mix until coated. Cook until potatoes are crispy on the edges. Place semi-cooked potatoes into crockpot on top of the chicken.
To a medium bowl add 1/2 cup grated parmesan cheese, 1/2 cup mozzarella cheese, 4 tsp minced garlic, 1 cup chicken broth, 1/2 cup milk, cracked black pepper.
Pour mixture over the potatoes & chicken in crockpot. Do not mix.
Place lid on crockpot and cook for 3-4 hours on high or 6-8 hours on low until chicken is tender and potatoes are tender as well.
Place 1/2 cup shredded parmesan cheese on top along with the 1/2 cup shredded mozzarella cheese. Sprinkle with fresh parsley. Place lid back on for a few minutes until cheeses have melted. Serve it up with favorite side or salad.