Easy Mongolian Beef

Name: Easy Mongolian Beef
Prep time: 10 min
Cook time: 15 min
Total time: 25 min
Cuisine: Asian
Ingredients: 5 tbsp oil ((I use avocado oil)); 1 1/2 tbsp cornflour ((cornstarch in USA)); pinch salt and black pepper; 400 g (14 oz) sirloin steak (sliced into thin strips (visible fat removed)); 1 tbsp minced ginger; 3 cloves garlic (peeled and minced); 120 ml (1/2 cup) reduced sodium soy sauce (I use dark, but all-purpose is fine too *see note); 1/4 tsp black pepper; 6 packed tbsp light brown muscavado sugar; 90 ml (1/3 cup) water; 8 spring onions ((scallions), sliced); boiled rice; or egg fried rice