Combine minced meat, prawns, water-chestnuts, sweet corn kernels and seasoning in a bowl. Stir to mix well. In the mixing, bring up the mixture and slap against the sides of the bowl until mixture turns sticky.
Lightly grease the palm of your hand and take out a tablespoon of mixture. Shape into a round ball.
Repeat until all the minced meat mixture is completed.
Heat oil in a wok and deep-fry the meat balls for 2 minutes or until they turn golden. Dish out.
Heat a nonstick saucepan and cook the sauce to a boil. Add chilli, tomato and spring onion. Return the prefried meat balls to the saucepan. Cook and toss for 1-2 minutes until well coated with the sauce.