Place the vermicelli noodles into a bowl. Cover with warm water and allow to soak for 15 minutes. Drain and pat dry with paper towel then using scissors, cut into roughly 4cm lengths. Place into a bowl.
Add the pork mince, carrots, spring/green onions, eschalots, garlic, coriander, egg, fish sauce, oyster sauce, stock powder, sugar, pepper and salt. Using your hands, mix until well combined.
Working with one wrapper at a time, place a heaped spoonful of the filling onto the corner closest to you. Fold the wrapper over to enclose then fold the sides in. Continue rolling up firmly (not that firmly that it splits though) but just before the end, using your finger, brush a little “flour glue” over the end corner then roll up to fully enclose and seal. Repeat with remaining ingredients until you have 20 rolls. Cover and chill until required (you can also freeze at this point too. see instructions in post above).
Heat enough oil in a wok or deep saucepan to come one-third up the sides until it reaches 170℃. Alternately, use an electric deep fryer following the manufacturer’s directions. Tip: To test if the oil is ready, drop a cube of bread into the oil—it should crisp up within 20 seconds. Alternatively, use a laser temperature gadget for accuracy.
First Deep Fry: Working with 4-5 spring rolls at a time, carefully lower them into the hot oil and cook for 4-6 minutes or until they are golden brown and crisp. Use a slotted spoon to remove them, drain on paper towels quickly, and then transfer to a wire rack. Repeat the this process with the remaining spring rolls, ensuring that the oil returns to the correct temperature before frying each batch
Second Deep Fry: Reheat the oil to 190℃. Do a second fry on the spring rolls, in batches, for 1-2 minutes until golden brown and 100% cooked through (make sure to test one). Drain and set aside.
Serve the Vietnamese fried spring rolls with the Nouc Cham Dipping Sauce or your sauce of choice along with lettuce, mint, pickled carrot and cucumber, if desired.