Titos Giannakakis: Best restaurant by far in Nydri. Best value for money also. Try the local wine by "Greek Cellars". No specific dish to recommend. Whatever you try, sure you'll find yourself smth special about it.
VSandra: Big and well organized beach, 8e/2 sunbeds and umbrella. 350 steps to reach, very steep access, better by boat. Big waves ! Good lounge, music, turquoise blue water, stunning.