Children love sweet and sour chicken
In a small saucepan saute the onion in olive oil over a low-medium heat until soft but not brown.
Drain any excess, mix with the pineapple pieces and set aside.
Rinse the saucepan, add the "sauce part 2" ingredients and mix thoroughly.
Bring to a gentle boil stirring constantly until sauce starts to thicken slightly, remove from heat and stir through the "sauce part 1" ingredients
Do part one in advance and refrigerated a while.
Season chicken with salt and/or pepper as desired.
Cook chicken pieces in oil over medium - high heat for around 7-10 minutes until cooked through.
Meanwhile gently warm back up the sauce and serve over the top along with rice and green peas.