Tangy Multi-mushroom Soup

Ingredients

• package enoki mushrooms
  1 small
• dried shiitake mushrooms
  5 to 6 large
• can straw mushrooms
  1 large
• black fungus mushrooms or any variety of mushroom you're comfy with — I used a dried version of these and they became huge!
  3 to 4 unit
• water
  8 cups
• dry sherry or rice wine
  ¼ cup
• cider vinegar
  ⅓ cup
• soy sauce
  2 tbsp
• egg whites
  2 to 3 unit
• sliced scallions
  3 unit
• white pepper
  ¼ to ½ tsp
• cornstarch
  2 tbsp