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