Rinse the beef tongue thoroughly. Slice off all the rough parts, slice into pieces. Pound garlic, black peppercorns, coriander seeds and salt until fine. Then put it on the ore beef tongue add the oysters sauce. Allow them to rest for 30 minutes. Preheat the air fryer at 200 degrees celsius, put the beef tongue in grill for 15 minutes or until cook. Slice it, put on top of the small noodles soup bowl.