Combine all of the chicken rub ingredients.
Trim excess fat from the chicken. Coat liberally with the rub.
Toss the potatoes in olive oil, minced garlic and salt.
Place the Lodge Cast Iron Cook-it-All grill pan over medium heat.
Place the chicken on the grill plate skin side down. Add the potatoes. Grill for 4-6 minutes.
Flip. Cover with the lid. Cook for 15-20 minutes, until the internal temperature of the chicken reaches 165F.
Remove from heat and serve.