Put the shrimp on a baking sheet and put it in the freezer for 1 hour. These will harden them but won't be completely frozen. The cold helps maintain a low temperature while mixing and shaping the prawn paste, which is crucial for achieving the desired bouncy and firm texture of the prawn balls.
Place the prawn and other ingredients, except for the cilantro leaves, for the prawn balls in a large food processor and pulse until it forms a sticky paste
Fold the chopped cilantro leaves into the paste and combine.
Cover and let this chill in the freezer for 30 minutes or about 1-2 hours in the refrigerator We want to make sure everything is nice and cold
Prepare the soup:
Put the chicken broth in a small pot. Bring to a boil then add the napa cabbage leaves and bring it back to a simmer and then lower the heat and let it simmer until the leaves are tender. Add chicken powder, ground white pepper, sugar, and salt to taste. Have a taste and adjust seasonings to your preference
Cook the prawn balls:
Wet your palm with some water. This is to prevent the paste from sticking to your hands. Pick up some of the prawn paste and squeeze a round ball shape out with your fingers. Use a spoon to scoop the ball off your hands or you can squeeze the prawn ball directly into the simmering soup.
You can also use a spoon to scoop the paste if you prefer.
Repeat with the rest of the prawn paste. Cook for about 2-3 minutes over medium-low heat until the prawn balls turn pink and cooked through
To serve:
Ladle the soup into a large bowl. Sprinkle with some finely chopped green onion and/or cilantro leaves as garnishes