Doesn't get simpler or tastier than this. Smear a combination of softened butter, lemon zest, rosemary, salt, and pepper both inside and on the outside of a whole chicken. Drizzle one lemon's worth of juice on the outside and stuff the inside with lemon halves and rosemary springs. Bake in a pre-heated oven at 400 degrees for an hour and fifteen minutes. Save the drumsticks for me.