The transparent sauce on the meat loaf bread is protein sauce. Protein sauce general supermarkets do not have, you can go to the back kitchen of the restaurant or Taobao bakery to buy, such as the bakery of Holloman special protein sauce, to choose the kind of 4, 5 kilograms of large white barrel (for different bread, still need to add some oil), the general small bakery most of the use of the wholesale market that kind of no-name brand, it should not be a natural ingredient.

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