Pre-heat oven to 400 degrees. Lay chicken and potatoes in a single layer on a baking sheet and drizzle with olive oil, garlic, rosemary, salt, pepper and lemon juice/zest. Using your hands or tongs, toss everything together so that chicken and potatoes are evenly coated in spices.
Roast until chicken reaches internal temperature of 165 degrees or higher, about 25-30 minutes.