Sweet and sour chicken balls

1) For meatballs :

• 1 pound of ground meat (can be pork, chicken or beef)
• 1 carrot finely grated
• 6 water chestnuts - finely cubes
• 2 spring onions finely chopped
• 2 tablespoons of oyster sauce
• 1 tablespoon of soy sauce
• 2 chilies finley cut
• 2 tablespoons of cornstarch
• 1 egg
• Salt and pepper to taste

2) For the sweet and sour meatballs :

• 15 cooked meatballs
• 1 cup of pineapple - cubes
• Half cucumber - cubes
• 1 small onions quartered
• 1 large tomato cut small
• 1/2 carrot - sliced thinly
• 1 clove of garlic - finely chopped
• 1 small piece finley chopped ginger
• 2 chillies chopped

Sauce :

• 4 tablespoons of tomato ketchup
• 2 tablespoons of sweet chili sauce
• Juice of 2 lemon
• 2 tablespoons of sugar
• 1 to 2 tablespoons of cornstarch
• 1 cup of chicken stock
• Salt and pepper to taste