Wash beef brisket and tendons, blanch in boiling water for 5 minutes. Drain away excess water.
Heat 2 tbsp of oil in a clay pot, and fry green onions, ginger and garlic. Add in brisket and tendons, and pour in enough cold water. Cold water should be 1 inch above beef which is fully soaked in water. Turn to medium heat and let cook for 1 hour, then turn heat off and let beef remain in pot, covered, and let cool thouroughly.
When cooled, let rest for another 2 hours without removing the cover.
return to heat and let simmer for 1 1/2 hour, then remove from heat and let cool again. Uncover, and check if meat is tender. If meat is still tough, follow earlier steps and cook until tender.
Heat 2tbsp oil in wok, fry minced ginger, sugar and wine and fry water spinach and place on plate. Using the same wok, fry the shrimp paste with 2 tbsp oil and fry until fragrant.
Add in beef to shrimp paste, and add some pepper. Thicken sauce.
Place beef tendons and brisket on top of the vegetables.
As cooking beef briskets require a lot of time, it is best to cook the beef for 1 1/2 hours the night before serving, and let covered overnight. Return to heat the next morning and briskets and tendons should be tender enough.