Heat oil until hot. Coat the fish with corn starch. Deep fry until fish is golden brown. Set aside and keep warm.
Saute garlic, onion, ginger, bell peppers, carrot and cucumber.
Add peppercorns and optional hot sauce.
Pour in the dissolved Sweet and Sour Mix or Sweet and Sour Sauce.
Stir and cook for another 5 minutes or until thick, to desired consistency
Add fish and simmer for about 2 minutes.
Serve hot.