In a medium size wok, heat cooking oil and fry potatoes and carrots until color turns light brown. Drain and set aside.
In the same wok, saute garlic until fragrant. Add onion and saute until soft.
Add in beef briskets and stir fry until the color turns to brown. Dissolve curry powder and hot water.
Pour fish sauce, curry powder and 1 1/2 cup water then simmer meat for 40 minutes or until meat is tender. Add more water if necessary.
Add in fried potatoes, carrots and bell peppers and simmer for a minute.
Pour in coconut milk, salt and ground pepper then simmer for another 4 to 6 minutes or until the liquid is slightly thick. Keep stirring to prevent sticking on the bottom of the wok.
Turn off heat and serve hot.