Preheat oven to 425
line a baking pan or dish with aluminum foil (enough to wrap around the ingredients and make a packet with room for a vent)
Place chicken potatoes and onion in a large bowl and toss to coat with olive oil.
Add lemon juice and all seasonings and toss to coat again.
Arrange the potatoes, onion, and chicken in the middle of the foil and top with the thin sliced lemon.
Close the ends of the packet and roll down the top of the foil packet leaving enough room to vent the heat.
Bake for 40-50 minutes or until the potatoes are tender and chicken is done.