Time Out says
Only two vegetarian restaurants in Germany have a coveted 2018 Michelin Star, and Seven Swans is one of them. Don’t rush down the Mainkai or you’ll miss the narrow building—Frankfurt’s narrowest, in fact—that houses it. Considered among the best restaurants in the world, Seven Swans offers a seasonal menu (choose from five or six fixed courses) using regional ingredients like fennel, leeks, pumpkin, apple and asparagus; take a look at the restaurant’s well-curated Instagram page to see the extraordinary attention to detail on every plate. Reservations here are a must, and the intimate candlelight dining, complete with a view of the Main River, is optimal for two people.