Braised egg tofu with mushroom

Ingredients

• 300 g egg tofu (about 2 tubes)
• one small canned mushroom (cut into smaller pieces)
• a few slice of carrot
• 1 egg
• spring onion for garnish (optional)
• 1 cup of water
• 2 tablespoons of concentrated abalone stock (can use concentrated chicken stock)
• 1 teaspoon oyster sauce
• 1 teaspoon light soy sauce
• 1 teaspoon sesame oil
• potato starch water(mix 1 tbsp potato starch with 2-3 tablespoons water)