Heat a wok or large frying pan over medium-high heat. Add 1 tablespoon sunflower oil, 2 cloves garlic, finely chopped and 2.5 cm fresh ginger, peeled and finely chopped. Stir fry for 20 seconds. Add 1/2 onion, sliced and 2 spring onions, sliced and stir fry for 1 minute. Add 1 portion chicken for Chinese takeaway style stir fry dishes, 1/4 teaspoon sea salt, 1/4 teaspoon MSG and mix well. Add the prepared sauce and 200 millilitres light chicken stock. Mix well, bring to the boil and simmer for 2 minutes until the sauce reduces slightly.