Sweet and sour pork spare ribs

Ingredients

• 500 gram pork rashers, cut into 2.5cm pieces
• 1 tablespoon soy sauce
• 1 tablespoon cornflour
• 4 clove garlic, sliced
• 2 tablespoon plain flour
• oil, for deep-frying
• 2 egg whites, lightly beaten
• 1/4 cup tomato sauce
• 2 tablespoon white vinegar
• 2 tablespoon sugar
• 200 gram green beans, to serve
• steamed rice, to serve
• green onion, sliced, to serve