Cut off the root ends of the cilantro and discard (you may use them for some other recipe but not for this one). Roughly chop the cilantro and place in a mixing bowl with the cleaned shrimps.
Add the calamansi juice, fish sauce, sugar, garlic and chilies to the shrimps and cilantro. Mix thoroughly.
Take a piece of spring wrapper and lay flat. Place a shrimp on top; allow the tail to protrude on one side. Top with a few sprigs of cilantro.
Wet the edges of wrapper. Fold the edge nearest you over the filling. Fold in the side opposite the tail then roll until the filling is fully enclosed. Repeat with the rest of the filling and wrappers.
Heat enough cooking oil to reach a depth of about two inches.
Fry the spring rolls, in batches if your frying pan is on the small side, until golden and crisp. Drain on paper towels.
Serve the shrimp spring rolls
Arrange the fried shrimp spring rolls on one side of a serving platter. Pile on the mustard leaves, lettuce, Thai basil and mint on the other side.
Serve the shrimp spring rolls and vegetables with the dipping sauce.
Notes
Updated from a recipe originally published in March 7, 2019. Update includes better and clearer step-by-step photos for making Vietnamese shrimp spring rolls.