Heat oil in a pan.
Saute garlic and onion until cook. Then add tomato and cook until it melts.
Add the pork, then pour-in water and boil for 5 minutes.
After 5 minutes. Add fish sauce and pepper. Simmer for another 5 minutes.
Then add the radish and carrot. Cover and boil for about 10 minutes over low heat. Stir occasionally.
Serve while hot. Enjoy!