If using frozen wrappers, you’ll want to de-thaw them now too.
Soak the bean thread noodles for 10 minutes in room temperature water until soft. Remove from water and cut the mess in 1/2.
Fry the mushrooms with 1 tablespoon of oil, 1 tablespoon of the oyster sauce and 2 teaspoons of the white soy sauce on medium high heat for about 5 minutes. Keep adding the mushroom water (which you soaked the mushrooms in) as it gets dry. Set aside.
Fry the garlic in a bit more oil until fragrant on medium-high heat. Add the noodles, mushrooms and the rest of the sauces. Stir well to mix.
Add the scallions and pepper. Remove and set aside. Let cool until room temperature.
Wrap the wrappers as shown. Put about 1-2 tablespoons of filling inside.
Seal with egg, water or wheat flour paste. Wheat flour paste can be made by combining a small spoon of wheat flour with water.
Deep fry on medium high heat. The oil should be dancing (you’ll see it move) but not smoking. Remove and let dry on a wire or mesh rack to keep it crispy.
Make the sauce by smashing the chili in a stone mortar and pestle, and mixing with the vinegar and sugar. Simmer over low heat until thicker, about 5 minutes.
4.Fry the spring rolls in the hot oil over low heat until crisp and golden brown, drain and serve with spring roll sauce, sweet basil (horapa), cucumbers and lettuce.