General Tso's chicken

Ingredients

• 1 egg
• 500 grams boneless, skinless chicken thighs, cut into 2.5cm chunks
• 1/3 cup cornflour, plus 2 teaspoons extra
• 1/4 teasponn sea salt
• 1/4 teaspoon white pepper
• 100 mililitres low-salt chicken broth
• 2 tablespoons soy sauce
• 2 tablespoons tomato sauce
• 2 teaspoons sugar
• 2 teaspoons unseasoned rice vinegar
• 1 1/2 tablespoons canola oil