Sweet and Sour Pork Balls

Name: Sweet and Sour Pork Balls
Ingredients: For The Meat; 1 lb ground pork; 1 tablespoon sesame oil; 1⁄3 cup cornstarch; 1 egg; 3 tablespoons soy sauce; For The Sauce; 1 teaspoon cornstarch; 1⁄3 cup dry sherry; 1⁄3 cup soy sauce; 1⁄4 cup tomato paste; 1⁄3 cup sugar; 3 tablespoons white wine vinegar; For The Stirfry; 3 tablespoons oil; 1 cup canned pineapple chunks in syrup; 1 large onion, coarsely chopped; 1 green bell pepper, coarsely chopped; 2 carrots, cut into julienne strips; hot steamed rice