Preheat oven to 400 degrees. Wash and dry potatoes then cut into quarters. Cut each quarter into two or three 1" wedges then place into a bowl. Add oil, salt, and pepper, toss to coat, then place onto a foil-lined, nonstick-sprayed baking sheet and roast for 35 minutes, flipping half way through.
Brush chicken breasts on both sides with oil then season with salt and pepper. Place onto a nonstick-sprayed baking sheet. In a small bowl combine parmesan cheese, garlic cloves, and oil then spread evenly on top of both chicken breasts. Roast for 20 minutes with potatoes.
Remove chicken and potatoes then sprinkle 2 Tablespoons parmesan cheese on top of hot potatoes and then serve.