Hoi Modern Vegetarian Dining at 81 Quan Thanh, Ba Dinh. A top-rated vegetarian & vegan restaurant in Hanoi, set in a tranquil French villa. We serve creative, plant-based Vietnamese cuisine, perfect for fine dining. Your trusted destination for authentic vegan food near the Old Quarter and Ho Chi Minh Mausoleum. Website: https://hoichay.com/. Phone: 0818468181. Address: 81 P. Quán Thánh, phường Ba Đình, Hà Nội.