Remove any hard fibrous stems from the mushrooms and clean carefully by brushing the mushrooms with a damp cloth or mushroom brush to remove excess dirt. Place the mushrooms in a food processor and pulse quickly to chop into 1/4-inch bits.
Heat 2 tablespoons vegetable oil in a large skillet over high heat until hot but not smoking. Add the mushrooms to the pan and saute until the mushrooms begin to sweat, about 2 to 3 minutes. Add the chopped shallots and ginger and saute until translucent. Sprinkle in the five spice powder and chopped scallions, season with salt and pepper and stir in the sesame oil. Set aside to cool.
Lay out the egg roll wrappers and cut into 4 equal squares. Brush a square of wrapper with some water, place a dollop of the mushroom mixture in the center and roll the sides of the wrapper inwards to enclose the filling. Rolling away from yourself, roll up the wrapper into a cigar shape and enclose the filling completely. Seal the ends with some of the water. Continue to finish filling the wrappers and refrigerate them several hours to firm them before cooking.
Heat the oil in a deep skillet to 345 degrees. Fry the spring rolls, in batches, until crisp. In a bowl, combine the ingredients of the dipping sauce and serve with the spring rolls.
ALTERNATE SPRING ROLL FILLING
Place all of the ingredients into the bowl of a food processor and pulse rapidly to a very coarse texture. Do not make too soft or pasty. Fill the springroll wrappers with the shrimp filling and follow all directions for cooking.;