1. The mutton is soaked in clear water for 20 minutes, washed and dried, and cut into small pieces;

2. Add salt, white pepper powder, cumin powder, barbecue material, egg white, onion, ginger, corn starch and vegetable oil to mutton, and marinate for 1-2 hours;

3. Wear the mutton with bamboo sticks, spread it flat on a baking tray covered with tin foil, and lightly brush it with a layer of oil;

4. Preheat in the oven at 180℃, put in a baking tray, and bake at 180℃ for about 4 minutes;

5. Take it out, turn it over, brush it with a layer of oil, and continue baking for about 4 minutes in slow baking mode180℃;

6. After baking, skim the barbecue material, Chili powder and cumin powder according to the taste.