I love the new trend (or not so new) of Asian street food that has begun in Madrid. Although many of them are franchises, I have to accept that the food is very good. One of them is “Buns & Bones”.
We tried it by chance one day walking around the Reina Sofia area. The buns were delicious, the place is tiny but it is fine for a quick meal with your couple (I do not recommend it for groups).

Web: http://www.bunsandbones.com/

Address: Santa Isabel, 5, Madrid; San Bernardo, 12, Madrid and Guzmán el Bueno, 69, Madrid

Metro: Anton Martin; Santo Domingo or Islas Filipinas

Price: 15 euros