Ingredients

• 2 tablespoons vegetable oil
• 4 boneless skinless chicken breasts, cut into 1in cubes
• 1 small red pepper, de-seeded and cut into 1in pieces
• 1 small green pepper, de-seeded and cut into 1in pieces
• 1 tablespoon fresh ginger, peeled and finely chopped
• 6 garlic cloves, chopped
• 1 (8 ounce) can water chestnuts, drained and sliced
• 1 (8 ounce) can pineapple slices, drained and cut into chunks
• white pepper
• 1 tablespoon soft light brown sugar
• 2 tablespoons rice vinegar
• 3 tablespoons rice wine or 3 tablespoons dry sherry
• 2 tablespoons dark soy sauce
• 3/4 cup chicken stock
• 2 tablespoons tomato paste
• 2 tablespoons cornflour, mixed with
• 1 bunch scallion, cut into 1in pieces