THE ROTI is a bakery in Hanoi's Old Quarter, next to King Roti, that specializes in roti buns. It bakes buns filled with chocolate, matcha chocolate, vanilla, salted egg, and mozzarella, with a crisp outside and a soft inside. Buns are baked continuously behind the counter and handed over hot, so the line moves quickly even when it looks long. The sweetness is strong and the outside is sometimes less crisp.