(1) Put buckwheat flour and white flour into a basin and mix well. Add water and stir the noodles into a thin paste with a spoon.

(2) Spoon the batter into a small dish with a spoon, steam it in a cage for 8 minutes, then take it out and cool it to form a bowl. When eating, cut into pieces and add soy sauce, vinegar, salt, mustard, Chili oil, garlic paste and chopped green onion to serve. Bean sprouts can also be fried with soy sauce, salt, garlic paste and vinegar.