After the water boils, add rice flour and try to put enough water; Boil it with cold water; Drain the water; Add pepper, garlic, onion, ginger and lean meat into another oil pan, and stir-fry diced mustard tuber until fragrant; Add spinach leaves, stir-fry and add light soy sauce to taste; Add rice flour, add soy sauce to color, turn off the fire with chopsticks, fork the dough and shake it quickly and vigorously; Add salt, mix well and take out of the pot.