1 – 1 1/2 pounds potatoes (red or gold potatoes work best in this recipe), thinly sliced (about 2 cups potato slices)
1 cup sliced mushrooms
Stir together seasonings and set aside. Add oil to a bowl along with chicken, potatoes, and mushrooms and toss to coat everything in the oil.
Lay out 4 12×12 sheets of nonstick foil on a flat surface. Divide chicken, potatoes, and mushrooms between each of the foil sheets. (If using thighs there should be 1-2 per foil sheet, if using breasts there should be 1 per foil sheet) Sprinkle with seasoning mixture.
Fold foil over the chicken-potato-mushroom mixture and scrunch the ends of the foil together to close off the foil pack.
Place foil packs on preheated grill and cook for about 10-15 minutes, then flip and cook another 5-7 minutes. Check the chicken for doneness, once cooked through, garnish with fresh herbs if desired (such as thyme, rosemary, or oregano) and serve immediately.