Marinate the chicken with 1 tbsp of vinegar ,salt, 2 tbsp of cornflour ,egg and sriracha.Keep aside for 1 hour.
Take a pan heat oil for deep fry.Now fry the marinated chicken till light golden brown.keep aside.
Now,take a wok pan heat some oil.add chopped ginger-garlic saute it for 2 minutes then,add onion,all the vegetables,mushroom,sugar,salt, Chilli flakes saute it for 5-7 minutes or till vegetables are half cooked. Now add soy sauce,vinegar mix it well and saute it for 5-7 minutes then, add 1 cup of water bring it to boil.Now pour in the cornflour mixture..(Mix 2 tbsp of cornflour in half cup of water)
Cook for another 5-8 minutes. Serve hot with your choice of Rice and Noodles.