In a large bowl combine all of the listed ingredients (except for 1 egg yolk) and mix well.
⅔ cups wood ear mushrooms, 650 g 23 oz ground pork, 300 g 10 oz raw prawns, peeled, de-veined and chopped, 5 eggs, 1 onion, 1 carrot, 80 g 2.8 oz mung bean noodles, soaked for 15 minutes and chopped, 3 tablespoon fish sauce, 3 garlic cloves, 1 ½ teaspoon salt, ½ teaspoon MSG, 1 tablespoon sugar