Heat a little oil in a large pan over medium heat. Add the sliced onion and cook until softened. Stir in the ginger garlic paste and cook until fragrant.
Add the chicken mince and cook, breaking it apart, until fully cooked and no longer pink.
Add the shredded cabbage and carrots. Cook for 3–4 minutes until slightly softened but not mushy.
Stir in the soy sauce, oyster sauce, sesame oil, sugar, and MSG. Season with salt and black pepper to taste. Cook for another 1–2 minutes, then turn off the heat and mix in the chopped spring onions.
If you notice excess moisture in the mixture, stir in 1 tablespoon of cornstarch or potato starch while the filling is still warm. This will absorb extra water and prevent soggy or bursting spring rolls.
Allow the filling to cool completely before wrapping.
Prepare a thick paste by mixing flour and water.
Place a spoonful of cooled filling onto a spring roll sheet and roll tightly, folding in the sides as you go. Seal the edge with the flour paste.
Repeat with the remaining filling.
This recipe yields approximately 22–28 thin spring rolls, depending on how tightly you roll them.
Heat oil to 170–180°C. Fry the spring rolls in batches until golden brown and crispy, about 3–4 minutes.
Remove and drain on paper towel before serving.