Mushroom Egg Drop Soup

Name: Mushroom Egg Drop Soup
Prep time: 5 min
Cook time: 10 min
Total time: 15 min
Cuisine: Chinese
Ingredients: 150 g mixed mushrooms (beach mushroom and oyster mushroom) ( , hard end removed and then separated); 2 green onion ( , chopped); 1/8 tsp. salt; 1/8 tsp. white pepper; 3 slices ginger; 2 egg ( , whisked); 1 tablespoon cooking oil; 1/2 teaspoon sesame oil; 4-6 cups water or stock