Chinese Hot and Sour Pork Soup

1/4 lb lean pork, julienned

2 tablespoons garlic and red chile paste

2 tablespoons soy sauce

3/4 teaspoon white pepper , ground

1/2 cup egg substitute

2 tablespoons cornstarch

1/2 cup bamboo shoot , julienned

1/2 cup water chestnut , sliced

1/2 cup carrot , julienned

1 cup shiitake mushroom , sliced and stems removed

1 cup straw mushroom

1 (12 ounce) package cake tofu , 1/4-inch dice

1/4 cup white vinegar

1 teaspoon sesame oil

1/4 cup dried black fungus, soaked for 1 hour

scallion , finely chopped, garnish