1. in a bowl, mix soy sauce, white vinegar, sugar, ginger, garlic, and dissolve cornstarch in water. mix well and add to the mixture. cook over medium heat, stirring until thickened, then remove from heat. 2. In another bowl, add olive oil, salt, and pepper to the chicken cubes. mix well. 3. In a pan over medium heat, cook the chicken until golden brown. gradually add the sauce, mixing until well combined. add sesame seeds and spring onions, cook for 5 more minutes, then remove from heat. 4. Serve and enjoy this delicious recipe.