Behind a handsome 19th-century facade is the best Greek restaurant in Frankfurt. Both food and decor are elevated about typical "taverna" level. Menu offerings are rooted in the simple, bold flavors of the Mediterranean and reliably good, with a special shoult-out to the grilled lamb with lemon marinade and rosemary potatos. There is also a catch-dependent fish and seafood list. Every morning except Sunday, Ariston doubles as an elegant cafe-bar.