Practice:
1. Chop beef into mud, wash onion and cut into powder for later use.
2. Then slowly add 300 grams of flour with water, yeast and proper amount of sugar, and make them into dough, which will be cooked for a while.
3. Melt 2 grams of bread improver with hot water, add the remaining flour, milk powder, water, sugar and butter and mix well.
4. When the dough is fermented twice as much as before, put all the dough together, knead it evenly and thoroughly, and then ferment it for the second time.
5. Divide the dough fermented for the second time into small doses, knead it for about 10 minute, knead it again, put it in a baking tray for baking, and brush with egg liquid and sprinkle with sesame seeds when the volume is twice the original.
6. When the oven temperature reaches 190℃, put the blank into the oven, bake it for about 8 minutes, press it with your hand, and take it out when the surface is red.
7. Mix minced onion, pepper, salt, monosodium glutamate and beef paste, and fry them into beef patties.
8. After the bread is completely cooled, cut it with a knife, and put in beef patties and two pieces of tomatoes. It's delicious.