1. Low powder sieved
2. Butter does not need to be softened, just cut into small cubes
3. Put the diced butter into the flour and knead it into crumbs
4. Add egg yolk, salt, cold water
5. Knead gently into a dough, wrap it in plastic wrap, and chill in the refrigerator to relax for 30 minutes
6. Refrigerate and take out the loose dough, sprinkle thin flour on the cutting board, and roll the dough into a sheet, about 3 mm thick
7. Move the dough to the tower mold, and lightly press the dough with your hands to make it tightly integrated with the tower mold
8. Then remove the excess dough and put it in the refrigerator to relax for 15 minutes
9. Take out the loose dough and use a fork to make a small hole in the bottom
10. Spread tin foil, put red beans on the dough, put it in the preheated 180 degree oven, middle layer, upper and lower fire, bake for 15 minutes, remove the beans, and bake for another 10 minutes
11. Making fillings: diced onions, mushrooms, and sausages
12. Heat the pot and melt the butter on low heat
13. Saute onion
14. Stir-fry the lower sausage
15. Stir-fry the mushrooms, add a little pepper to taste
16. Spread the fried fillings on the baked dough
17. 1 egg mixed with whipped cream
18. Pour on the filling
19. Topped with mozzarella cheese
20. Put it into the preheated 180 degree oven, middle level, upper and lower fire, bake until the toothpick is inserted into the non-stick material and it will be out of the oven
