Korean Grilled Beef Large Intestine (Daechang)

Rinse the beef large intestine under cold water. Place it in a large bowl, add wheat flour and coarse salt, and rub thoroughly for 5-10 minutes to remove impurities and odor. Rinse well until water runs clear. Add vinegar and rub for another 2-3 minutes, then rinse thoroughly again. Pat dry with paper towels. Cut into bite-sized pieces if desired.