In a skillet, heat the oil over medium heat. Add the shallot and sauté until soft, about 2 minutes. Add the pork and sauté until no longer pink, 3-4 minutes. Add the fish sauce or salt, and stir to combine.

Stir in the daikon, cover and cook, stirring occasionally, for 5 minutes. Add the water and stir. Without stirring add the vinegar. Let the mixture boil, stir and cook, covered and stirring occasionally until the daikon is tender, about 4 minutes. Add fish sauce or salt, to taste. Season with freshly cracked black pepper.

Serve with steamed rice and fish sauce on the side.