Braised beef with soup, cooked using a thermal cooker

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A thermal cooker is also called a vacuum cooker. Beef cooked using a thermal cooker is very tender and, however, keeps its flavor. This recipe generates about 3 cups of beef soup which is also very delicious . The beef and soup may be served with noodles. I would like to point out one bad thing about this dish. That is, it is so delicious that one cannot stop at just eating one or two pieces.

Ingredients:

1. Beef shanks, about 2 pounds, cut into slices of 1.5 inches in thickness.
2. Shaoxing rice wine, 1/2 cup
3. Ginger, 6 slices
4. Plum tomatoes, 3, diced
5. Green onions, 2
6. Salt, 1 Tablespoon
7. Sugar, 1 Tablespoon
8. Water, 3 cups

Directions:

1. Boil beef in water for 5 minutes;
   
2. Transfer beef into the removable pot of a vacuum cooker;
3. Reserve the water and remove the foam on top;
4. Add all other ingredients and the reserved water to the removable pot with the beef;
5. Place the removable pot on stove and boil the beef mixture for 5 minutes, partially covered;
6. Place the removable pot into the vacuum flask;
7. Wait for an hour;
8. Take the removable pot out of the vacuum flask;
   
9. Place the removable pot on stove and boil the beef mixture again for 5 minutes, partially covered;
10. Place the removable pot back into the vacuum flask again;
11. Wait for another hour, the beef should be ready.