1teaspoonrice vinegar , both white or black version can work
1teaspoonsugar
3teaspoonscorn starch
Instructions
Marinate ground pork with a small pinch of salt, soy sauce and sesame oil.
Chop green onion, garlic and ginger, and then soak with 3 tablespoons of water.
In another bowl, mixing all ingredients for sweet and sour sauce.
Add the ginger, green onion and garlic water in the ground pork by three batches. Stir in one direction until the pork absorbs the water completely after each adding.
Place around 3 teaspoons of cornstarch in the mixture and continue stirring for 2-3 minutes until the pork becomes slightly sticky and present a paste like texture.
Shape them into balls (mine is around 4cm- 5cm in diameter). Pat them several times between the two palms so the balls will become dense enough. If you feel the pork is slightly sticky, coat your hand with clean water or wear a plastic glove.
Heat up around 4 tablespoons of cooking oil in wok (we will exclude some of them after frying the meatballs, so do not be scared about the oil amount); place the balls in to fry. Let them stay here for a while and turn over from time to time. Fry until both sides get golden brown. Be gentle and do not break them. Transfer the meatballs out and pour the extra oil out too.
Pour sweet and sour sauce mixture to the wok and wait, heat until boiling. Return the meatballs to coat with the sauce. Continue heating about 1-2 minutes until the sauce is thickened and well coated on the balls. Transfer out and serving with steamed rice. Garnish green onion if you prefer.