Citrus and Ginger Chicken

¾ kilo chicken breast or thigh, very thinly sliced 1 onion, finely sliced 1 tbsp Ginger Stir-In Paste 1 tsp Garlic Stir-In Paste 1 large orange or lemon, zested and juiced 1 and 1/2 tbsp Chilli, Hot Stir-In Paste 1 tbsp sugar 2 tbsp soy sauce 1 tbsp vinegar 1/2 tsp oil 2-3 spring onions, finely chopped (optional) Heat oil in a pan. Add chicken and leave to brown a little before stirring. Add everything else except the spring onions which is for garnishing.Cook for 3 to 5 minutes. If you want to thicken the sauce, mix 1 tbsp cornstarch with 5 tbsp cold water. Then fold into the chicken while cooking. Season to taste.