To make Seasoning Sauce: Combine all ingredients in small bowl, and mix well.
To make Filling: Combine mushrooms, steamed carrots and bamboo shoots. Heat wok, and add 2 tablespoons oil. Stir-fry mushrooms, carrots and bamboo shoots for 1 minute. Stir Seasoning Sauce, add 3 tablespoons to wok and toss well. Remove from heat, and set aside to cool.
To make “Duck” Rolls: Place bean curd skins flat on work surface. Trim off thick or uneven edges, and square circles. Mist surface lightly with water to soften, if necessary. Cut sheets in half, and stack.
Stir Seasoning Sauce, spread about 2 tablespoons on bottom skin and top with second skin. Brush second skin with 2 tablespoons Seasoning Sauce, and scatter one-third of mushroom mixture over top, spreading out to cover sheet on all surfaces. Repeat with remaining two sheets. Roll stacked sheets jellyroll fashion. Cut each roll in half, and cover with plastic wrap to firm in refrigerator for about 1 hour.
Heat 3 cups oil in large stockpot to 375F. Remove rolls from refrigerator, and discard plastic wrap. Deep-fry until golden brown, and remove from oil with tongs or slotted spoon. Place rolls on paper towel to remove excess oil, drizzle with remaining seasoning sauce and slice into 16 rolls.
To serve, place “Duck” Rolls on platter with scallions and folded Peking pancakes. Pass with hoisin sauce, adding more sauce as needed.