Step 1:
1) add the two tbsp olive oil to the frying pan Step 2:
2) chop the onion and cut the chicken into bitesize peices Step 3:
3) set the gas mark to 4 and add the chopped onion and chichen Step 4:
4)open the can of pineapple and pour the juice into a bowl ( make sure the is 200ml of it if not add cold water to make up the difference) Step 5:
5) cut the pineapple into chunks and add to the frying pan Step 6:
6) add the vinegar,soy sauce, brown sugar, tomato puree/ketchup, cornflour and a pinch of salt and pepper. Step 7:
7) stir well and then add to fying pan Step 8:
8) let it simmer until chicken is cooked 