2 tbsp cake flour or plain flour - dissolve 3 tbsp water
1 packet of spring roll wrap (about 25 to 30 papers)
1. In a frying-pan, heat 1 tbsp vegetable oil and fry garlic and ginger until fragrant. Add onion, lotus root, vermicelli and cook until wilted over medium heat. Add tuna and cook for another 2 mins.
2. Add all the ingredient A to season. Turn the heat to high and pour diluted katakuriko/potato starch to thicken the sauce. Let it cool to room temperature.
3. Lay a spring roll wrap flat, tip down. Place the filling mixture centered in the lower tier of the wrap. Roll up tightly. Dab a little 'glue' mixture along the edges to seal. Repeat until you finish the filling mixture.
4. Pour enough oil in a wok or large saucepan and heat on medium-high until hot : Stick in a bamboo chopstick, if bubbles appear, it's hot enough :). Place the rolls gently in the oil and cook both side, turning occasionally, until nicely and evenly golden. Transfer them to a plate lined with paper towels to drain the excess oil.