In a pot or instant pot, put some oil and put in sugar or rock sugar. Heat it on medium until the sugar dissolve. Add the beef in and stir fry until there are no red left on the beef.
Add in half tomatoes.
Add in the sauce prepared earlier.
Add all the aromatics, water and salt. Close the lid if using instant pot
Pressure cook for 25 minutes. If cooking on stove top, cover and simmer for 40 minutes.
Once done, release the steam. Open the lid and discard the aromatics. Add in the rest of the tomatoes and put on sauté.
If cooking on stove top, discard the aromatics, add rest of the tomatoes and simmer for 10 minutes.
Add in cornstarch water to thicken the stew.
Serve with rice and sprinkle some green onions as a topping.