Bayankhongor's most pleasant restaurant is clean and family-friendly, but doesn't have an English menu. They have two or three chicken dishes (takhia ny makh) and the usual mutton offerings. Their chinjutei makhan khuurag (stir-fried meat, peppers and onions with rice) is supposedly tasty, and the moogtei makhan khuurag (fried mutton with mushrooms) is popular.
Walk down the left side of Khan Bank and it's on your left.