I did sweet&sour chicken the other day, it's a bit faffy, but you can break it into sections and potter with it
...chicken into bits, sit in dish with lime or lemon juice, pinch of chilli flakes, S&P and a small tin of pineapple in juice...chop up the pineapple and throw it in too ..add a splash of anything chinesey you have in the fridge (soy/oyster/fish)
I you want it sharper then use more lemon/lime and less pineapple
Once it has been in there for a couple of hours pick all the chicken out and dust over enough cornflour (up to cup ful if you have lots of chicken) over the chicken to get a thin batter effect, best to put it in a dish and keep stirring, if you go too far with the cornflour just add a tsp or so of the pineapple juice marinade
deep fry the chicken in small batches at about 350....nice and hot, until it is golden and let it drain on kitchen paper.
put the marinade into a pan, tip in any of the batter that is left, add some honey or brown sugar and bring it to the boil, it should be quite thick....if it is too gloopy add a bit more lemon juice/pineapple
to serve I put the chicken into dish, poured over the sauce and set it into a really hot oven so the sauce sizzles and stickies up the battered chicken, serve with noodles or rice
I did this on Saturday and they have all asked for it again!