Sweet and sour pork or chicken

Dice the pork loin or chicken, whisk the eggs with a little water, dip the meat into the mixture, then coat it in potato starch and sauté in a very hot pan with oil for two minutes.
Place 400 ml of water in a pot, add the fruit and vegetables, two tablespoons of sugar, and two tablespoons of vinegar. If desired, add 1 tablespoon of tomato paste, a tablespoon of oil, and a pinch of salt to add color. Bring to a boil while stirring, adding some potato starch to thicken the sauce.
Turn off the heat, add the meat, and serve.